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Zhang C, Wang Z, Da Z, Shi J, Wang J, Xu Y, Gaponenko NV, Bhatti AS, Wang M. One-Step Preparation of High-Stability CsPbX 3/CsPb 2X 5 Composite Microplates with Tunable Emission. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38598608 DOI: 10.1021/acsami.4c00178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The core-shell structure is an effective means to improve the stability and optoelectronic properties of cesium lead halide (CsPbX3 (X = Cl, Br, I)) perovskite quantum dots (QDs). However, confined by the ionic radius differences, developing a core-shell packaging strategy suitable for the entire CsPbX3 system remains a challenge. In this study, we introduce an optimized hot-injection method for the epitaxial growth of the CsPb2X5 substrate on CsPbX3 surfaces, achieved by precisely controlling the reaction time and the ratio of lead halide precursors. The synthesized CsPbX3/CsPb2X5 composite microplates exhibit an emission light spectrum that covers the entire visible range. Crystallographic analyses and density functional theory (DFT) calculations reveal a minimal lattice mismatch between the (002) plane of CsPb2X5 and the (11 ¯ 0) plane of CsPbX3, facilitating the formation of high-quality type-I heterojunctions. Furthermore, introducing Cl- and I- significantly alters the surface energy of CsPb2X5's (110) plane, leading to an evolutionary morphological shift of grains from circular to square microplates. Benefiting from the passivation of CsPb2X5, the composites exhibit enhanced optical properties and stability. Subsequently, the white light-emitting diode prepared using the CsPbX3/CsPb2X5 composite microplates has a high luminescence efficiency of 136.76 lm/W and the PL intensity decays by only 3.6% after 24 h of continuous operation.
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Affiliation(s)
- Chen Zhang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zeyu Wang
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an, Shaanxi 710049 China
| | - Zheyuan Da
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jindou Shi
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Junnan Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Youlong Xu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Nikolai V Gaponenko
- Belarusian State University of Informatics and Radioelectronics, P. Browki 6, Minsk 220013, Belarus
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad, 44500 Pakistan
- Virtual University of Pakistan, 5 Atta Turk Avenue, Sector G-5/1, Islamabad 44000, Pakistan
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
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Alam MK, Nobin MNM, Ali ML. Pressure-induced tuning of physical properties in high-throughput metal halide MSn 2Br 5 (M = K, Cs) perovskites for optoelectronic applications. RSC Adv 2024; 14:1267-1283. [PMID: 38174239 PMCID: PMC10762723 DOI: 10.1039/d3ra06215e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/19/2023] [Indexed: 01/05/2024] Open
Abstract
The physical properties of the ferromagnetic oxide perovskites MSn2Br5 (M = K, Cs) were thoroughly examined using the GGA + PBE formalism of density functional theory. The investigation includes a comprehensive characterization of these materials under hydrostatic pressures ranging up to 25 GPa. Our work represents the first theoretical framework for exploring the behavior of MSn2Br5 (M = K, Cs) under pressure, providing valuable insights into their properties. To ensure the thermodynamic and mechanical stability of the studied compounds, we justified their stability through the analysis of formation energy and Born stability criteria. Furthermore, we conducted a thorough examination of the mechanical features of MSn2Br5 (M = K, Cs) based on various parameters, such as elastic constants, elastic moduli, the Kleinman parameter, the machinability index, and the Vickers hardness. Pugh's ratio and Poisson's ratio data show a ductile behavior for both compounds under stress. Moreover, our analysis of the refractive index suggests that both materials hold significant potential as candidates for ultrahigh-density optical data storage devices, particularly when subjected to appropriate laser irradiation. This finding opens up exciting possibilities for utilizing MSn2Br5 (M = K, Cs) in advanced optical technologies.
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Affiliation(s)
- Md Khairul Alam
- Department of Physics, Pabna University of Science and Technology Pabna-6600 Bangladesh
| | | | - Md Lokman Ali
- Department of Physics, Pabna University of Science and Technology Pabna-6600 Bangladesh
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Mukherjee M, Chatterjee A, Bhunia S, Purkayastha P. Hydrophobic Chain-Induced Conversion of Three-Dimensional Perovskite Nanocrystals to Gold Nanocluster-Grafted Two-Dimensional Platelets for Photoinduced Electron Transfer Substrate Formulation. J Phys Chem Lett 2023; 14:8251-8260. [PMID: 37676104 DOI: 10.1021/acs.jpclett.3c01886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Considering the augmentation of new generation energy harvesting devices and applications of electron-hole separation therein, conversion of 3D cubic CsPbBr3 perovskite nanocrystals into 2D-platelets through ligand-ligand hydrophobic interactions has been conceived here. Cationic surfactants with various chain length coated the gold nanoclusters (AuNCs) that interact with oleic acid (OA) and oleylamine (OAm) coated 3D CsPbBr3 nanocrystals to disintegrate the crystallinity of the perovskites and reformation of AuNC-grafted 2D-platelets of unusually large size. The planar perovskite-derivatives act as an exciton donor to the embedded AuNCs through photoinduced electron transfer (PET). This process is controlled by the optimum surfactant chain length. Transient absorption spectroscopy shows that the fastest radical growth time (4 ps) was with the 14-carbon containing tail of the surfactant, followed by the 16-carbon (45 ps) and the 12-carbon (290 ps) ones. PET is administered by the energy gaps of the participating candidates that control the transition dynamics. Our findings can be a potential tool to develop metal nanocluster-based hybrid 2D perovskite-derived platelets for optoelectronic applications.
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Affiliation(s)
- Manish Mukherjee
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, West Bengal, India
| | - Arunavo Chatterjee
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, West Bengal, India
| | - Soumyadip Bhunia
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, West Bengal, India
| | - Pradipta Purkayastha
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, West Bengal, India
- Center for Advanced Functional materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, West Bengal, India
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Zhang C, Wang Z, Wang M, Shi J, Wang J, Da Z, Zhou Y, Xu Y, Gaponenko NV, Bhatti AS. Ultrastable CsPbBr 3@CsPb 2Br 5@TiO 2 Composites for Photocatalytic and White Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37454395 DOI: 10.1021/acsami.3c07081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Although cesium halide lead (CsPbX3, X = Cl, Br, I) perovskite quantum dots (QDs) have excellent photovoltaic properties, their unstable characteristics are major limitations to application. Previous research has demonstrated that the core-shell structure can significantly improve the stability of CsPbX3 QDs and form heterojunctions at interfaces, enabling multifunctionalization of perovskite materials. In this article, we propose a convenient method to construct core-shell-structured perovskite materials, in which CsPbBr3@CsPb2Br5 core-shell micrometer crystals can be prepared by controlling the ratio of Cs+/Pb2+ in the precursor and the reaction time. The materials exhibited enhanced optical properties and stability that provided for further postprocessing. Subsequently, CsPbBr3@CsPb2Br5@TiO2 composites were obtained by coating a layer of dense TiO2 nanoparticles on the surfaces of micrometer crystals through hydrolysis of titanium precursors. According to density functional theory (DFT) calculations and experimental results, the presence of surface TiO2 promoted delocalization of photogenerated electrons and holes, enabling the CsPbBr3@CsPb2Br5@TiO2 composites to exhibit excellent performance in the field of photocatalysis. In addition, due to passivation of surface defects by CsPb2Br5 and TiO2 shells, the luminous intensity of white light-emitting diodes prepared with the materials only decayed by 2%-3% at high temperatures (>100 °C) when working for 24 h.
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Affiliation(s)
- Chen Zhang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Zeyu Wang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Canbridge, Massachusetts 02138, United States
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Jindou Shi
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Junnan Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Zheyuan Da
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Yun Zhou
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Youlong Xu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Nikolai V Gaponenko
- Belarusian State University of Informatics and Radioelectronics, P. Browki 6, 220013 Minsk, Belarus
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44500, Pakistan
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Kashtiban RJ, Patrick CE, Ramasse Q, Walton RI, Sloan J. Picoperovskites: The Smallest Conceivable Isolated Halide Perovskite Structures Formed within Carbon Nanotubes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208575. [PMID: 36528852 DOI: 10.1002/adma.202208575] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Halide perovskite structures are revolutionizing the design of optoelectronic materials, including solar cells, light-emitting diodes, and photovoltaics when formed at the quantum scale. Four isolated sub-nanometer, or picoscale, halide perovskite structures formed inside ≈1.2-1.6 nm single-walled carbon nanotubes (SWCNTs) by melt insertion from CsPbBr3 and lead-free CsSnI3 are reported. Three directly relate to the ABX3 perovskite archetype while a fourth is a perovskite-like lamellar structure with alternating Cs4 and polyhedral Sn4 Ix layers. In ≈1.4 nm-diameter SWCNTs, CsPbBr3 forms Cs3 PbII Br5 nanowires, one ABX3 unit cell in cross section with the Pb2+ oxidation state maintained by ordered Cs+ vacancies. Within ≈1.2 nm-diameter SWCNTs, CsPbBr3 and CsSnI3 form inorganic-polymer-like bilayer structures, one-fourth of an ABX3 unit cell in cross section with systematically reproduced ABX3 stoichiometry. Producing these smallest halide perovskite structures at their absolute synthetic cross-sectional limit enables quantum confinement effects with first-principles calculations demonstrating bandgap widening compared to corresponding bulk structural forms.
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Affiliation(s)
- Reza J Kashtiban
- Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
| | | | - Quentin Ramasse
- SuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury, WA44AD, UK
- School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Richard I Walton
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Jeremy Sloan
- Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
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Wang M, Yu Q, Yu T, Zhang S, Gong M, Liu Y. Manipulating the formation of cesium lead bromide nanocrystals via oleic acid. RSC Adv 2023; 13:5158-5167. [PMID: 36777941 PMCID: PMC9909387 DOI: 10.1039/d2ra06491j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/20/2023] [Indexed: 02/11/2023] Open
Abstract
To realize the precise modulation among the cesium lead halide perovskite-related phases is one of the most fascinating subjects and has motivated increasing research. The formation mechanisms of different phases of cesium lead halide have not been fully recognized. In this work, we reported the phase-selective synthesis of CsPbBr3 nanorods and Cs4PbBr6 nanocrystals (NCs) in amine-free systems, simply by adjusting the dosage of oleic acid (OA). By utilizing UV-visible absorption spectroscopy, we probed the evolution of the NCs and some lead bromide complex species during syntheses in reaction systems with different OA dosages. An OA-limited condition facilitated the formation of [PbBr4]2- and Cs4PbBr6 NCs. OA-rich conditions facilitated the formation of [PbBr3]-, [Pb2Br5]-, etc. at early stages and the subsequent generation of CsPbBr3 NCs. As the reaction systems equilibrated at a later stage, as-prepared CsPbBr3 or Cs4PbBr6 NCs would coexist with certain lead bromide complexes. OA dosage also greatly affected the kinetics of reactions toward CsPbBr3 NCs. A relatively large amount of OA would accelerate the formation of CsPbBr3 NCs. Our experimental results support two-step formation pathways of the cesium lead bromide NCs going through lead bromide complexes, and suggest that OA exerted all the influence by virtue of the lead bromide complexes. Our study presents a relatively clear picture of the formation of CsPbBr3 and Cs4PbBr6 NCs, which should be helpful in improving the preparation of lead halide perovskite-related NCs.
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Affiliation(s)
- Miao Wang
- College of Physics, Sichuan University Chengdu 610065 China
| | - Qiyu Yu
- College of Material Science and Engineering, Sichuan University of Science and Engineering Zigong 643000 China
- Key Laboratory of Material Corrosion and Protection of Sichuan Province Zigong 643000 China
| | - Tian Yu
- College of Physics, Sichuan University Chengdu 610065 China
| | - Sijie Zhang
- College of Physics, Sichuan University Chengdu 610065 China
- School of Science, Guizhou University of Engineering Science Guizhou 551700 China
| | - Min Gong
- College of Physics, Sichuan University Chengdu 610065 China
| | - Yuehui Liu
- Engineering Research Center in Biomaterials, Sichuan University Chengdu 610065 China
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7
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Abstract
As an emerging new class of semiconductor nanomaterials, halide perovskite (ABX3, X = Cl, Br, or I) nanocrystals (NCs) are attracting increasing attention owing to their great potential in optoelectronics and beyond. This field has experienced rapid breakthroughs over the past few years. In this comprehensive review, halide perovskite NCs that are either freestanding or embedded in a matrix (e.g., perovskites, metal-organic frameworks, glass) will be discussed. We will summarize recent progress on the synthesis and post-synthesis methods of halide perovskite NCs. Characterizations of halide perovskite NCs by using a variety of techniques will be present. Tremendous efforts to tailor the optical and electronic properties of halide perovskite NCs in terms of manipulating their size, surface, and component will be highlighted. Physical insights gained on the unique optical and charge-carrier transport properties will be provided. Importantly, the growing potential of halide perovskite NCs for advancing optoelectronic applications and beyond including light-emitting devices (LEDs), solar cells, scintillators and X-ray imaging, lasers, thin-film transistors (TFTs), artificial synapses, and light communication will be extensively discussed, along with prospecting their development in the future.
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8
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Yao J, Xu L, Wang S, Yang Z, Song J. Recent progress of single-halide perovskite nanocrystals for advanced displays. NANOSCALE 2022; 14:13990-14007. [PMID: 36125019 DOI: 10.1039/d2nr03872b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Light-emitting diodes based on lead halide perovskite nanocrystals (LHP NCs) have shown an astonishing increase in efficiency in just several years of academic research, reaching high external quantum efficiencies exceeding 20%. The extensive color-tunability and narrow emission bandwidth of LHP NCs, in particular, are of great importance in the creation of the next generation of ultra-high-definition displays, as defined by the Rec. 2020 standard recommendation. In fact, whereas the colour of LHP NCs can be easily tuned by the compositions of halogens, the ion migration in mixed-halide perovskites under the electric field will seriously affect the spectral stability and operational lifetimes of perovskite light-emitting diodes (PeLEDs). Therefore, it is essential to realize efficient colour-saturated PeLEDs based on single-halide perovskite NCs. In this review, we focus on the recent progress in LHP NC-based PeLEDs and highlight the strategy of tuning the spectral emission based on quantum confinement or cation alloying/doping in single-halide perovskite NCs. Finally, we will give an outlook on future research avenues for preparing high-efficiency pure green, red and blue PeLEDs based on single-halide perovskite NCs.
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Affiliation(s)
- Jisong Yao
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou 450052, China.
| | - Leimeng Xu
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou 450052, China.
| | - Shalong Wang
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou 450052, China.
| | - Zhi Yang
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou 450052, China.
| | - Jizhong Song
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou 450052, China.
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Jan Q, Nabi S, Ahmad Sofi F, Ahmad Bhat M. CsPbBr 3 perovskite nanoplatelets: Excellent probes for spectrofluorimetric sensing of chloride and arsenite. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 270:120749. [PMID: 34973619 DOI: 10.1016/j.saa.2021.120749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/03/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Herein, we report a novel analytical exploitation of selective but very facile anion exchange induced phase transformations of CsPbBr3 Perovskite crystallites. Specifically, with CsPbBr3 Perovskite as Spectrofluorimetric probes, we demonstrate a simple, quick and economical analytical procedure for sensing and quantification of chloride content in room temperature ionic liquids (RTILs), and that of toxic pollutant Arsenic (III) in water samples. The presented approach relies on the variations in photoluminescence characteristics of CsPbBr3 Perovskite nanoplatelets on account of very facile substitution of their bromide ions by chloride ions available in their vicinity. This unique property of CsPbBr3 Perovskite nanoplatelets ensures detection of chloride impurity in RTIL samples, within the concentration range of 0.007-0.016 ppb with LOD c.a. 0.0010 ppb ± 0.44% and of Arsenic in water samples within the concentration range 0.48-4.32 ppb with LOD as low as c.a. 0.074 ppb ± 0.46%.
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Affiliation(s)
- Qounsar Jan
- Department of Chemistry, University of Kashmir, Srinagar, J & K 190006, India
| | - Shazia Nabi
- Department of Chemistry, University of Kashmir, Srinagar, J & K 190006, India
| | - Feroz Ahmad Sofi
- Department of Chemistry, University of Kashmir, Srinagar, J & K 190006, India
| | - Mohsin Ahmad Bhat
- Department of Chemistry, University of Kashmir, Srinagar, J & K 190006, India.
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Chen T, Wang C, Xing X, Qin Z, Qin F, Wang Y, Alam MK, Hadjiev VG, Yang G, Ye S, Yang J, Wang R, Yue S, Zhang D, Shang Z, Robles-Hernandez FC, Calderon HA, Wang H, Wang Z, Bao J. Integration of Highly Luminescent Lead Halide Perovskite Nanocrystals on Transparent Lead Halide Nanowire Waveguides through Morphological Transformation and Spontaneous Growth in Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105009. [PMID: 35060296 DOI: 10.1002/smll.202105009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The integration of highly luminescent CsPbBr3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing, and quantum communications. On the other hand, CsPb2 Br5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here, the growth of CsPbBr3 nanocrystals on CsPb2 Br5 nanowires is reported first by simply immersing CsPbBr3 powder into pure water, CsPbBr3- γ Xγ (X = Cl, I) nanocrystals on CsPb2 Br5 -γ Xγ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in situ monitoring, reveal that CsPbBr3 powder is first converted to CsPb2 Br5 microplatelets in water, followed by morphological transformation from CsPb2 Br5 microplatelets to nanowires, which is a kinetic dissolution-recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb2 Br5 . CsPbBr3 nanocrystals are spontaneously formed on CsPb2 Br5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence, and SEM imaging confirm that the bright emission originates from CsPbBr3 -γ Xγ nanocrystals while CsPb2 Br5 -γ Xγ nanowires are transparent waveguides. The intimate integration of nanoscale light sources with a nanowire waveguide is demonstrated through the observation of the wave guiding of light from nanocrystals and Fabry-Perot interference modes of the nanowire cavity.
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Affiliation(s)
- Tao Chen
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Chong Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Xinxin Xing
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Zhaojun Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Fan Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Yanan Wang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Md Kamrul Alam
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Viktor G Hadjiev
- Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
| | - Guang Yang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shuming Ye
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Jie Yang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Rongfei Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Shuai Yue
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Di Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zhongxia Shang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Francisco C Robles-Hernandez
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Mechanical Engineering Technology, University of Houston, Houston, TX, 77204, USA
| | - Hector A Calderon
- Instituto Politecnico Nacional, ESFM-IPN, UPALM, Departamento de Física, Mexico CDMX, 07338, Mexico
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Jiming Bao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
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11
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Lian H, Li Y, Saravanakumar S, Jiang H, Li Z, Wang J, Xu L, Zhao W, Han G. Metal halide perovskite quantum dots for amphiprotic bio-imaging. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214313] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Paul T, Sarkar PK, Maiti S, Sahoo A, Chattopadhyay KK. Solution-Processed Light Induced Multilevel Non-volatile Wearable Memory Device Based on CsPb2Br5 Perovskite. Dalton Trans 2022; 51:3864-3874. [DOI: 10.1039/d1dt03699h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite of the recent advancements on memory devices, quest for the building materials having low-power consumption is still on with the ultimate focus over durability of system and reliability and...
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13
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Pradhan J, Das A, Kundu K, Chahat, Biswas K. Soft crystal lattice and large anharmonicity facilitate the self-trapped excitonic emission in ultrathin 2D nanoplates of RbPb 2Br 5. Chem Sci 2022; 13:9952-9959. [PMID: 36128238 PMCID: PMC9430307 DOI: 10.1039/d2sc02992h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/31/2022] [Indexed: 11/27/2022] Open
Abstract
Self-trapping of excitons (STE) and concomitant useful broadband emission in low-dimensional metal halides occur due to strong electron–phonon coupling, which exhibit potential applications in optoelectronics and solid-state lighting. Lattice softness and high anharmonicity in the low-dimensional structure can lead to transient structural distortion upon photoexcitation that should promote the spatial localization or trapping of charge carriers, which is essential for STE. Herein, we report the ligand-assisted reprecipitation synthesis of ultrathin (∼3.5 nm) two-dimensional (2D) metal halide, RbPb2Br5 nanoplates (NPLs), which demonstrate highly Stokes shifted and broadband emission covering most parts of the visible to near IR range (500–850 nm) with a long-lived photoluminescence (PL) lifetime. The excitation wavelength independent emission and emission wavelength independent excitation spectra along with the analogous PL decay kinetics of bulk and NPLs suggest the intrinsic nature of broadband emission. The experimental low sound velocity (∼1090 m s−1) and associated low bulk and shear moduli (10.10 and 5.51 GPa, respectively) indicate the large anharmonicity and significantly soft lattice structure, which trigger the broadband STE emission in 2D NPLs of RbPb2Br5. Strong electron-longitudinal optical (LO) phonon coupling results in broadband STE emission in 2D RbPb2Br5 NPLs. The presence of large anharmonicity and lattice softness in low dimensional metal halide, RbPb2Br5 nanoplates, trigger strong electron–phonon coupling and consequently highly Stokes shifted broadband emission originates from self-trapped excitons.![]()
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Affiliation(s)
- Jayita Pradhan
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P. O., Bangalore 560064, India
| | - Anustoop Das
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P. O., Bangalore 560064, India
| | - Kaushik Kundu
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P. O., Bangalore 560064, India
| | - Chahat
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P. O., Bangalore 560064, India
| | - Kanishka Biswas
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P. O., Bangalore 560064, India
- School of Advanced Materials, International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P. O., Bangalore 560064, India
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14
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Bera S, Behera RK, Das Adhikari S, Guria AK, Pradhan N. Equilibriums in Formation of Lead Halide Perovskite Nanocrystals. J Phys Chem Lett 2021; 12:11824-11833. [PMID: 34870990 DOI: 10.1021/acs.jpclett.1c03461] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Physical insights related to ion equilibrium involved in the synthesis of lead halide perovskite nanocrystals remain key parameters for regulating the phase stability and luminescence intensity of these emerging materials. These have been extensively studied since the development of these nanocrystals, and different reaction processes controlling the formation of CsPbX3 nanocrystals are largely understood. However, growth kinetics related to the formation of these nanocrystals have not been established yet. Hence, more fundamental understanding of the formation processes of these nanocrystals is urgently required. Keeping these in mind and emphasizing the most widely studied nanocrystals of CsPbBr3, different equilibrium processes involved in their synthesis for phase and composition variations are summarized and discussed in this Perspective. In addition, implementations of these findings for shape modulations by growth are discussed, and several new directions of research for understanding more fundamental insights are also presented.
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Affiliation(s)
- Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Rakesh Kumar Behera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Samrat Das Adhikari
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Amit K Guria
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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15
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Dutta SK, Bera S, Behera RK, Hudait B, Pradhan N. Cs-Lattice Extension and Expansion for Inducing Secondary Growth of CsPbBr 3 Perovskite Nanocrystals. ACS NANO 2021; 15:16183-16193. [PMID: 34636535 DOI: 10.1021/acsnano.1c05053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The increase of the stability of perovskite nanocrystals with respect to exposure to polar media, layers growth, or shelling with different materials is in demand. While these are widely studied for metal chalcogenide nanocrystals, it has yet to be explored for perovskite nanocrystals. Even growth of a single monolayer on any facet or on the entire surface of these nanocrystals could not be established yet. To address this, herein, a secondary growth approach leading to creation of a secondary lattice with subsequent expansion on preformed CsPbBr3 perovskite nanocrystals is reported. As direct layer growth by adding precursors was not successful, Cs-lattice extension to preformed CsPbBr3 nanocrystals was performed by coupling CsBr to these nanocrystals. Opening both {110}/{002} and {200} facets of parent CsPbBr3 nanocrystals, CsBr was observed to be connected with lattice matching to the {200} facets. Further with Pb(II) incorporation, the Cs-sublattices of CsBr were expanded to CsPbBr3 and led to cube-couple nanocrystals. However, as cubes in these nanostructures were differently oriented, these showed lattice mismatch at their junctions. This lattice mismatch though restricted complete shelling but successfully favored the secondary growth on specific facets of parent CsPbBr3 nanocrystals. Details of this secondary growth via lattice extension and expansion are microscopically analyzed and reported. These results further suggest that lead halide perovskite nanocrystals can be epitaxially grown under proper reaction design and more complex as well as heterostructures of these materials can be fabricated to meet the current demands.
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Affiliation(s)
- Sumit Kumar Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Sciences, Kolkata 700032, India
| | - Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Sciences, Kolkata 700032, India
| | - Rakesh Kumar Behera
- School of Materials Sciences, Indian Association for the Cultivation of Sciences, Kolkata 700032, India
| | - Biswajit Hudait
- School of Materials Sciences, Indian Association for the Cultivation of Sciences, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Sciences, Kolkata 700032, India
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16
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Precise Control of Green to Blue Emission of Halide Perovskite Nanocrystals Using Terbium Chloride as Chlorine Source. NANOMATERIALS 2021; 11:nano11092390. [PMID: 34578706 PMCID: PMC8470515 DOI: 10.3390/nano11092390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/29/2021] [Accepted: 09/01/2021] [Indexed: 11/28/2022]
Abstract
CsPbClxBr3-x nanocrystals were prepared by ligand-assisted deposition at room temperature, and their wavelength was accurately adjusted by doping TbCl3. The synthesized nanocrystals were monoclinic and the morphology was almost unchanged after doping. The fluorescence emission of CsPbClxBr3-x nanocrystals was easily controlled from green to blue by adjusting the amount of TbCl3, which realizes the continuous and accurate spectral regulation in the range of green to blue. This method provides a new scheme for fast anion exchange of all-inorganic perovskite nanocrystals in an open environment at room temperature.
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17
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Park Y, Kim SH, Lee D, Lee JS. Designing zero-dimensional dimer-type all-inorganic perovskites for ultra-fast switching memory. Nat Commun 2021; 12:3527. [PMID: 34112776 PMCID: PMC8192534 DOI: 10.1038/s41467-021-23871-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/21/2021] [Indexed: 11/08/2022] Open
Abstract
Resistive switching memory that uses halide perovskites (HP) has been considered as next-generation storage devices due to low operation voltage and high on/off ratio. However, the memory still faces challenges for stable operation with fast switching speed, which hinders the practical application. Thus, it should be considered from the stage of designing the HP for memory applications. Here, we design the perovskite memory using a high-throughput screening based on first-principles calculations. Total 696 compositions in four different crystal structures are investigated and essential parameters including stability, vacancy formation, and migration are considered as the descriptor. We select dimer-Cs3Sb2I9 as an optimal HP for memory; the device that uses dimer-Cs3Sb2I9 has ultra-fast switching speed (~20 ns) compared to the device that uses layer-Cs3Sb2I9 (>100 ns). The use of lead-free perovskite avoids environmental problems caused by lead in perovskite. These results demonstrate the feasibility to design the memory with ultra-fast switching speed.
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Affiliation(s)
- Youngjun Park
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea
| | - Seong Hun Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea
| | - Donghwa Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea.
- Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
| | - Jang-Sik Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea.
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18
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Fang X, Ye J, Duan D, Cai X, Guo X, Li K. Aspartic acid assisted one-step synthesis of stable CsPbX 3@Asp-Cs 4PbX 6 by in situ growth in NH 2-MIL-53 for ratiometric fluorescence detection of 4-bromophenoxybenzene. Mikrochim Acta 2021; 188:204. [PMID: 34043073 DOI: 10.1007/s00604-021-04863-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 05/13/2021] [Indexed: 12/15/2022]
Abstract
A molecularly imprinted ratiometric fluorescent sensor was synthesized for the detection of 4-bromophenoxybenzene (BDE-3) based on perovskite quantum dots and metal organic framework. First, aspartic acid (Asp) was introduced during the synthesis of perovskite CsPbX3 for the formation of a core-shell structure of CsPbX3@Asp-Cs4PbX6. Due to the protection of the shell layer Cs4PbX6, the stability of the core CsPbX3 was improved significantly. Compared to CsPb(BrI)3, the ultraviolet and thermal stabilities of CsPb(BrI)3@Asp-Cs4Pb(BrI)6 were increased by 26 times and 32 times, respectively, and, compared to CsPbBr3, these stabilities of CsPbBr3@Asp-Cs4PbBr6 were increased by 3 times and 13 times, respectively. The water stabilities of CsPb(BrI)3@Asp-Cs4Pb(BrI)6 and CsPbBr3@Asp-Cs4PbBr6 were greatly improved too. Then, a ratiometric fluorescence sensor was constructed by in situ growth of CsPb(BrI)3@Asp-Cs4Pb(BrI)6 in metal organic framework (NH2-MIL-53) for the detection of BDE-3, in which the orange fluorescence of CsPb(BrI)3@Asp-Cs4Pb(BrI)6 (614 nm) was regarded as the reference signal and the cyan fluorescence of NH2-MIL-53 (494 nm) was used as the fluorescence response signal. To improve the selectivity of the sensor, the molecular imprinting polymer (MIP) was modified on the NH2-MIL-53 and an imprinting factor of 3.17 was obtained. Under 365 nm light excitation, the fluorescent response signal at 494 nm was quenched gradually by BDE-3 in the range 11.4 to 68.5 nmol/L, while the reference signal at 614 nm remained unchanged. The limit of detection and limit of quantification were 3.35 and 11.2 nmol/L, respectively, and the fluorescent color of the sensor changed gradually from cyan to green to orange, which illustrated that the developed sensor has an ability to recognize BDE-3 specifically, a good anti-interference ability, and a sensitively visual detection ability. Moreover, the sensor was successfully applied to the BDE-3 detection in polyethylene terephthalate plastic bottle, polyvinyl chloride plastic bag, and circuit board with satisfactory recoveries (96.3-108.1%) and low relative standard deviations (5%). The preparation processes of NH2-MIL-53, NH2-MIL-53-CsPb(BrI)3@Asp-Cs4Pb(BrI)6, and the MIP-NH2-MIL-53-CsPb(BrI)3@Asp-Cs4Pb(BrI)6 composites.
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Affiliation(s)
- Xiaoyu Fang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Jianping Ye
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Ding Duan
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xin Cai
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xinmin Guo
- Department of Ultrasound, Guangzhou Red Cross Hospital, Medical College, Jinan University, Guangzhou, 510220, China.
| | - Kang Li
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
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19
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Wilke M, Gawryluk DJ, Casati N. Metastability and Seeding Effects in the Mechanochemical Hybrid Lead(II) Iodide Formation. Chemistry 2021; 27:5944-5955. [PMID: 33319376 DOI: 10.1002/chem.202004431] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/09/2020] [Indexed: 11/06/2022]
Abstract
The mechanism for the mechanochemical synthesis of (C(NH2 )3 )3 PbI5 3 and (C(NH2 )3 )4 PbI6 4 and their conversion into each other is presented. We investigated the synthesis of 3 at different frequencies and energies using in situ powder X-ray diffraction. By splitting the reaction into single parts we could prove that the formation of 3 is simply dependent on the energy and mixing speed. The nucleation of 4 instead is slightly negative dependent on the energy but dependent on the mixing speed, while its growth is mostly independent of any influence. We were able to influence the reaction pathways by seeding the mixture with a small amount of powdery 4. The formation of 4 is very likely an auto-catalytic process. 3 instead is metastable. It can be stabilized by energy, which beside mechanochemistry can also be achieved by temperature. The results showcases the complex nature of mechanochemical reactions.
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Affiliation(s)
- Manuel Wilke
- Laboratory for Synchrotron Radiation-Condensed Matter, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
| | - Dariusz Jakub Gawryluk
- Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
| | - Nicola Casati
- Laboratory for Synchrotron Radiation-Condensed Matter, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
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20
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Zhou Y, Yu Y, Zhang Y, Liu X, Yang H, Liang X, Xia W, Xiang W. Highly Photoluminescent CsPbBr 3/CsPb 2Br 5 NCs@TEOS Nanocomposite in Light-Emitting Diodes. Inorg Chem 2021; 60:3814-3822. [PMID: 33570916 DOI: 10.1021/acs.inorgchem.0c03573] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
All-inorganic halide perovskite (CsPb2Br5) nanocrystals (NCs) have received widespread attention owing to their unique photoelectric properties. This work reports a novel strategy to control the phase transition from CsPbBr3 to CsPb2Br5 and investigates the effects of different treatment times and treatment temperatures on perovskite NCs formation. By controlling the volume of tetraethoxysilane (TEOS) added, the formation of different phases of perovskite powder can be well controlled. In addition, a white light-emitting diode (WLED) device is designed by coupling the CsPbBr3/CsPbBr3-CsPb2Br5 NCs@TEOS nanocomposite and CaAlSiN3:Eu2+ commercial phosphor with a 460 nm InGaN blue chip, exhibiting a high luminous efficiency of 57.65 lm/W, color rendering index (CRI) of 91, and a low CCT of 5334 K. The CIE chromaticity coordinates are (0.3363, 0.3419). This work provides a new strategy for the synthesis of CsPbBr3/CsPbBr3-CsPb2Br5 NCs@TEOS nanocomposite, which can be applied to the field of WLEDs and display devices.
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Affiliation(s)
- Yufeng Zhou
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yanxia Yu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yaqian Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xiaodong Liu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Haisheng Yang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xiaojuan Liang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Wei Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Weidong Xiang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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21
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Pradhan N. Alkylammonium Halides for Facet Reconstruction and Shape Modulation in Lead Halide Perovskite Nanocrystals. Acc Chem Res 2021; 54:1200-1208. [PMID: 33586428 DOI: 10.1021/acs.accounts.0c00708] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
ConspectusThe interactions of halides and ammonium ions with lead halide perovskite nanocrystals have been extensively studied for improving their phase stability, controlling size, and enhancing their photoluminescence quantum yields. However, all these nanocrystals, which showed intense and color tunable emissions, mostly retained the six faceted cube or platelet shapes. Shape tuning needs the creation of new facets, and instead of composition variations by foreign ions interactions/substitutions, these require facet stabilizations with suitable ligands. Among most of the reported cases of lead halide perovskites, alkyl ammonium ions are used as a capping agent, which substituted in the surface Cs(I) sites of these nanocrystals. Hence, new surface ligands having a specific binding ability with different facets other than those in cube/platelet shapes are required for bringing stability to new facets and, hence, for tuning their shapes.In this Account, interactions of alkyl ammonium ions on the surface of perovskite nanocrystals and their impact on surface reconstructions are reviewed. Emphasizing the most widely studied CsPbBr3 nanocrystals, the usefulness and impact of alkyl ammonium ions on the phase stability, high-temperature annealing, enhancement of the brightness and doping in these nanocrystals are first discussed. Then, nanocrystals formed under limited primary alkyl ammonium ions and also with specific tertiary ammonium ions having new facets are elaborated. Further, the treatment of excess alkyl ammonium halides to these newly formed multifaceted polyhedron nanocrystals under different conditions, which led to armed and step-armed structures, are discussed. The change in optical properties during these shape transformations is also presented. Finally, the shape-change mechanism with alkyl ammonium halide-induced dissolutions of {200} and {112} facets and formation of {110} and {002} facets are discussed. Further, in summary, future prospects of new ligand designing for stabilizing new facets of perovskite nanocrystals and obtaining new shapes and properties are proposed.
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Affiliation(s)
- Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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22
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Yao JS, Wang JJ, Yang JN, Yao HB. Modulation of Metal Halide Structural Units for Light Emission. Acc Chem Res 2021; 54:441-451. [PMID: 33397090 DOI: 10.1021/acs.accounts.0c00707] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
ConspectusWith the development of solid-state lighting technology, efficient light sources that combine high brightness, wide range, and good stability are in high demand for next-generation lighting and displays. Metal halides are emerging as promising luminescent materials due to their versatility for desirable light emission manipulations. This is because the optical activity of the metal halide material depends on the metal halide structural unit and the organic ions or coordinated organic ligands. The different assembly of metal halide units and organic parts can enable versatile light emissions, such as lead halide perovskites (LHPs) and copper halide-organic hybrids. Impressively, the external quantum efficiency of the LHP based light-emitting diodes (LEDs) has improved significantly from 0.1% to over 20% in just five years. With this great progress, the structural lability and toxicity of the LHPs are now the critical issues that need to be addressed for practical applications. These issues are mainly rooted in the intrinsic lead composition and low formation energy crystal structure of the widely adopted LHPs. Thus, the modulation of the structure and composition of the basic metal halide structural units is considered a rational strategy to address these issues.In this Account, we will present a general material design using metal halide structural units as basic building blocks to build up metal halide luminescent materials for solid-state lighting devices. Following this route, we will emphasize the modulation of metal halide structural units to tackle the existing challenges in lead halides, including the instability of crystalline structure, ion migration, and the presence of toxic lead. Considering basic components in structural units, we will highlight ionic engineering in LHPs via ion doping, substitution, and modification to enhance the crystal structural stability and suppress ion migration. To replace toxic lead, we will introduce recent advances in the modulation of lead-free halide structural units by active ion doping and organic ligand coordination to fabricate highly luminescent materials. Finally, we will present future strategies of metal halide structural unit modulation for solid-state light emissions. We hope this Account will provide new insights for designing metal halide materials from the viewpoint of the modulation of the basic building blocks and inspire future studies of advanced metal halide materials for solid-state light emitting applications.
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Affiliation(s)
- Ji-Song Yao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jing-Jing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jun-Nan Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hong-Bin Yao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
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23
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Kang TW, Park YJ, Jeong GJ, Hwang J, Kim JH, Kim JS, Bae B, Tota K, Kim SW. Synthesis and optical properties of Cs 4PbBr 6 perovskite nanocrystals by the water assisted solid-state reaction (WASSR) method. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01451f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we demonstrate the synthesis of green-emitting Cs4PbBr6 perovskite nanocrystals by the WASSR method for the first time.
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Affiliation(s)
- Tae Wook Kang
- Electronic Convergence Materials Division
- Optic & Electronic Component Materials Center
- Korea Institute of Ceramic Engineering and Technology
- Jinju 52851
- Korea
| | - Young Ji Park
- Electronic Convergence Materials Division
- Optic & Electronic Component Materials Center
- Korea Institute of Ceramic Engineering and Technology
- Jinju 52851
- Korea
| | - Gyu Jin Jeong
- Electronic Convergence Materials Division
- Optic & Electronic Component Materials Center
- Korea Institute of Ceramic Engineering and Technology
- Jinju 52851
- Korea
| | - Jonghee Hwang
- Electronic Convergence Materials Division
- Optic & Electronic Component Materials Center
- Korea Institute of Ceramic Engineering and Technology
- Jinju 52851
- Korea
| | - Jin Ho Kim
- Electronic Convergence Materials Division
- Optic & Electronic Component Materials Center
- Korea Institute of Ceramic Engineering and Technology
- Jinju 52851
- Korea
| | - Jong Su Kim
- Department of Display Science and Engineering
- Pukyong National University
- Busan 48513
- Korea
| | - Byungseo Bae
- Advanced Resources Team
- Yeongwol Industrial Promotion Agency
- Gangwon-do 26240
- Korea
| | - Kenji Tota
- 5 Graduate School of Science and Technology
- Niigata University
- Niigata 950-2181
- Japan
| | - Sun Woog Kim
- Electronic Convergence Materials Division
- Optic & Electronic Component Materials Center
- Korea Institute of Ceramic Engineering and Technology
- Jinju 52851
- Korea
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24
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Acharyya P, Kundu K, Biswas K. 2D layered all-inorganic halide perovskites: recent trends in their structure, synthesis and properties. NANOSCALE 2020; 12:21094-21117. [PMID: 33057536 DOI: 10.1039/d0nr06138g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recently, halide perovskites have appeared as a superior class of materials for diverse applications, mainly in optoelectronics and photovoltaics. Perovskite halides are broadly classified as hybrid organic-inorganic and all-inorganic analogues depending on the chemical nature of the A cation in the ABX3-type structure. Immense progress has already been achieved in halide perovskites focusing mainly on the hybrid equivalents and all-inorganic three-dimensional (3D) structures, however all-inorganic two-dimensional (2D) layered halide perovskites are relatively new and their nanostructures have gained significant attention in the last few years. In this minireview, we presented a discussion on the recently developed all-inorganic 2D layered halide perovskites highlighting their crystal structure, synthetic methodologies, chemical transformations, and optical properties. We have demonstrated a significant number of examples of Pb-free 2D halide perovskite nanostructures. Strategies for the shape-controlled synthesis of nanostructures and their excitonic properties are discussed in detail. Thermal conductivity and thermoelectric properties are emphasized along with the magnetic properties of layered transition-metal based perovskites. We have also mentioned the recent examples of all-inorganic 2D halide perovskites as photocatalysts for solar-driven CO2 reduction. Finally, we have concluded the article with an outlook for the further progress in 2D all-inorganic halide perovskites toward the structural diversity and prospective new applications.
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Affiliation(s)
- Paribesh Acharyya
- New Chemistry Unit and School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India.
| | - Kaushik Kundu
- New Chemistry Unit and School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India.
| | - Kanishka Biswas
- New Chemistry Unit and School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India.
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25
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Wang R, Li Z, Li S, Wang P, Xiu J, Wei G, Liu H, Jiang N, Liu Y, Zhong M. All-Inorganic Perovskite CsPb 2Br 5 Nanosheets for Photodetector Application Based on Rapid Growth in Aqueous Phase. ACS APPLIED MATERIALS & INTERFACES 2020; 12:41919-41931. [PMID: 32829630 DOI: 10.1021/acsami.0c05754] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
All-inorganic cesium lead-halide perovskites exhibit a great development prospect in optoelectronic devices owing to their stability and remarkable optoelectronic properties. Herein, we investigate the solution-processed synthesis of perovskite CsPb2Br5 nanosheets by using aqueous and ethanol as solvents. The results show that the aqueous environment ensures the phase formation of CsPb2Br5 and that the supersaturated solution in ethanol boosts nucleation of the nanosheets. The substrate temperature is the key factor for the evolution of morphology and the variation of the thickness of CsPb2Br5 nanosheets. Lower substrate temperature (<35 °C) is conducive to the formation of evenly distributed nanosheets with less stacking. The spatial and time-resolved fluorescence spectra indicate the heterogeneity of the defect density and the recombination process in different nanosheet regions. The photodetector based on the prepared CsPb2Br5 nanosheet displays an excellent switching current ratio (9 × 102), a short rise and decay time (43 and 83 ms, respectively), and good stability (75% of the initial current after 90 days in air). In addition, the mechanical stability and flexibility of the photodetector on the flexible substrate are investigated for 500 bending cycles.
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Affiliation(s)
- Rendong Wang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Zhao Li
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Shutao Li
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Pengfei Wang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Junshan Xiu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Gongxiang Wei
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Huiqiang Liu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Ning Jiang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Yunyan Liu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Mianzeng Zhong
- Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China
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Huang ZP, Ma B, Wang H, Li N, Liu RT, Zhang ZQ, Zhang XD, Zhao JH, Zheng PZ, Wang Q, Zhang HL. In Situ Growth of 3D/2D (CsPbBr 3/CsPb 2Br 5) Perovskite Heterojunctions toward Optoelectronic Devices. J Phys Chem Lett 2020; 11:6007-6015. [PMID: 32628484 DOI: 10.1021/acs.jpclett.0c01757] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-dimensional (2D) CsPb2Br5 exhibits intriguing functions in enhancing the performance of optoelectronic devices in terms of environmental stability and luminescence properties when composited with other perovskites in different dimensionalities. We built a type I three-dimensional (3D) CsPbBr3/2D CsPb2Br5 heterojunction through phase transition where CsPbBr3 quantum dots in situ grew into 2D CsPb2Br5. A thorough growth mechanism study in combination with excited state dynamic investigations via femtosecond spectroscopy and first-principles calculations revealed that the type I hierarchy enhanced the stability of the heterojunction and spurred its luminous quantum yield by prolonging the lifetime of photogenerated carriers. Mixing the heterojunction with other phosphors yielded white-light-emitting diodes with a color rendering index of 94%. The work thus not only offered one new avenue for building heterojunctions by using the "soft crystal" nature of perovskites but also disentangled the enhanced luminescence mechanism of the heterojunction that can be harnessed for promising applications in the luminescence and display fields.
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Affiliation(s)
- Zhi-Peng Huang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Bo Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Na Li
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Rui-Tong Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Ze-Qi Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Dong Zhang
- National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Harbin 150001, China
| | - Ji-Hua Zhao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Pei-Zhu Zheng
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Qiang Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
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Jung J, Kim SH, Park Y, Lee D, Lee J. Metal-Halide Perovskite Design for Next-Generation Memories: First-Principles Screening and Experimental Verification. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001367. [PMID: 32832372 PMCID: PMC7435252 DOI: 10.1002/advs.202001367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Memory devices have been advanced so much, but still it is highly required to find stable and reliable materials with low-power consumption. Halide perovskites (HPs) have been recently adopted for memory application since they have advantages of fast switching based on ionic motion in crystal structure. However, HPs also suffer from poor stability, so it is necessary to improve the stability of HPs. In this regard, combined first-principles screening and experimental verification are performed to design HPs that have high environmental stability and low-operating voltage for memory devices. First-principles screening identifies 2D layered AB2X5 structure as the best candidate switching layer for memory devices, because it has lower formation energy and defect formation energy than 3D ABX3 or other layered structures (A3B2X7, A2BX4). To verify results, all-inorganic 2D layered CsPb2Br5 is synthesized and used in memory devices. The memory devices that use CsPb2Br5 show much better stability and lower operating voltages than devices that use CsPbBr3. These findings are expected to provide new opportunity to design materials for reliable device applications based on calculation, screening, and experimental verification.
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Affiliation(s)
- Ju‐Hyun Jung
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Korea
| | - Seong Hun Kim
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Korea
| | - Youngjun Park
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Korea
| | - Donghwa Lee
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Korea
- Division of Advanced Materials SciencePohang University of Science and Technology (POSTECH)Pohang37673Korea
| | - Jang‐Sik Lee
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Korea
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28
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Wang H, Li H, Cai W, Zhang P, Cao S, Chen Z, Zang Z. Challenges and strategies relating to device function layers and their integration toward high-performance inorganic perovskite solar cells. NANOSCALE 2020; 12:14369-14404. [PMID: 32617550 DOI: 10.1039/d0nr03408h] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Parallel to the flourishing of inorganic-organic hybrid perovskite solar cells (PSCs), the development of inorganic cesium-based metal halide PSCs (CsPbX3) is accelerating, with power conversion efficiency (PCE) values of over 20% being obtained. Although CsPbX3 possesses numerous merits, such as superior thermal stability and great potential for use in tandem solar cells, severe challenges remain, such as its phase instability, trap state density, and absorption range limitations, hindering further performance improvements and commercialization. This review summarizes challenges and strategies relating to each device functional layer and their integration for the purposes of performance improvement and commercialization, utilizing the fundamental configuration of a perovskite photo-absorption layer, electron transport layer (ETL), and hole transport layer (HTL ). In detail, we first analyze comprehensively strategies for designing high-quality CsPbX3 perovskite films, including precursor engineering, element doping, and post-treatment, followed by discussing the precise control of the CsPbX3 film fabrication process. Then, we introduce and analyze the carrier dynamics and interfacial modifications of inorganic ETLs, such as TiO2, SnO2, ZnO, and other typical organic ETLs with p-i-n configuration. The pros and cons of inorganic and organic HTLs are then discussed from the viewpoints of stability and band structure. Subsequently, promising candidates, i.e., HTL-free carbon-electrode-based inorganic CsPbX3 PSCs, that meet the "golden triangle" criteria used by the PSC community are reviewed, followed by discussion of other obstacles, such as hysteresis and large-scale fabrication, that lie on the road toward PSC commercialization. Finally, some perspectives relating to solutions to development bottlenecks are proposed, with the attempt to gain insight into CsPbX3 PSCs and inspire future research prospects.
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Affiliation(s)
- Huaxin Wang
- Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044, China.
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29
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Dahl JC, Wang X, Huang X, Chan EM, Alivisatos AP. Elucidating the Weakly Reversible Cs-Pb-Br Perovskite Nanocrystal Reaction Network with High-Throughput Maps and Transformations. J Am Chem Soc 2020; 142:11915-11926. [PMID: 32531162 DOI: 10.1021/jacs.0c04997] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Advances in automation and data analytics can aid exploration of the complex chemistry of nanoparticles. Lead halide perovskite colloidal nanocrystals provide an interesting proving ground: there are reports of many different phases and transformations, which has made it hard to form a coherent conceptual framework for their controlled formation through traditional methods. In this work, we systematically explore the portion of Cs-Pb-Br synthesis space in which many optically distinguishable species are formed using high-throughput robotic synthesis to understand their formation reactions. We deploy an automated method that allows us to determine the relative amount of absorbance that can be attributed to each species in order to create maps of the synthetic space. These in turn facilitate improved understanding of the interplay between kinetic and thermodynamic factors that underlie which combination of species are likely to be prevalent under a given set of conditions. Based on these maps, we test potential transformation routes between perovskite nanocrystals of different shapes and phases. We find that shape is determined kinetically, but many reactions between different phases show equilibrium behavior. We demonstrate a dynamic equilibrium between complexes, monolayers, and nanocrystals of lead bromide, with substantial impact on the reaction outcomes. This allows us to construct a chemical reaction network that qualitatively explains our results as well as previous reports and can serve as a guide for those seeking to prepare a particular composition and shape.
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Affiliation(s)
| | | | | | | | - A Paul Alivisatos
- Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
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30
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Chen Y, Liu Y, Hong M. Cation-doping matters in caesium lead halide perovskite nanocrystals: from physicochemical fundamentals to optoelectronic applications. NANOSCALE 2020; 12:12228-12248. [PMID: 32507865 DOI: 10.1039/d0nr02922j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
All-inorganic caesium lead halide perovskite nanocrystals (PeNCs) with different dimensionalities have recently fascinated the research community due to their extraordinary optoelectronic properties including tunable bandgaps over the entire visible spectral region, high photoluminescence quantum yields (PLQYs) close to unity and narrow emission line widths down to 10-20 nm, making them particularly suitable as promising candidates for numerous applications ranging from light-emitting diodes (LEDs), solar cells to scintillators. Despite the considerable progress made in the past six years, the real-world applications of caesium lead halide PeNCs themselves especially in the category of CsPbX3 (X = Cl, Br and I) are still restricted by their labile crystal lattices and downgraded luminescence when exposed to ambient air conditions. Recent experimental and theoretical studies on cation doping have proven to be an effective way to significantly improve the physicochemical properties of cesium lead halide PeNCs, which would have profound implications for a range of applications. In this review, we provide a brief overview of the most recent advances in cation-doped all-inorganic caesium lead halide PeNCs, aimed at developing high-performance and long-term stable optoelectronic and photovoltaic devices, which covers areas from their fundamental considerations of cation doping, controlled synthesis methodology and novel physicochemical properties to the optoelectronic applications with an emphasis on perovskite-based LEDs and solar cells. And finally, some possible directions of future efforts toward this active research field are also proposed.
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Affiliation(s)
- Yameng Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. and University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Yongsheng Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. and University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Maochun Hong
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. and University of the Chinese Academy of Sciences, Beijing, 100049, China
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31
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Wang H, Dou Y, Shen P, Kong L, Yuan H, Luo Y, Zhang X, Yang X. Molecule-Induced p-Doping in Perovskite Nanocrystals Enables Efficient Color-Saturated Red Light-Emitting Diodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001062. [PMID: 32309915 DOI: 10.1002/smll.202001062] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/19/2020] [Accepted: 03/19/2020] [Indexed: 06/11/2023]
Abstract
Color-saturated red light-emitting diodes (LEDs) with emission wavelengths at around 620-640 nm are an essential part of high-definition displays. Metal halide perovskites with very narrow emission linewidth are promising emitters, and rapid progress has been made in perovskite-based LEDs (PeLEDs); however, the efficiency of the current color-pure red PeLEDs-still far lags behind those of other-colored ones. Here, a simple but efficient strategy is reported to gradually down-shift the Fermi level of perovskite nanocrystals (NCs) by controlling the interaction between NCs and their surface molecular electron acceptor-benzyl iodide with aromatic rings-and realize p-doping in the color-saturated 625 nm emitting NCs, which significantly reduces the hole injection barrier in devices. Besides, both the luminescence efficiency and electric conductivity of perovskite NCs are enhanced as additional advantages as the result of surface defects passivation. As a result, the external quantum efficiency for the resulting LED is increased from 4.5% to 12.9% after benzyl iodide treatment, making this device the best-performing color-saturated red PeLED so far. It is further found that the hole injection plays a more critical role than the photoluminescence efficiency of perovskite emitter in determining the LED performance, which implies design principles for efficient thin-film planar LEDs.
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Affiliation(s)
- Haoran Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
| | - Yongjiang Dou
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
| | - Piaoyang Shen
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
| | - Lingmei Kong
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
| | - Hao Yuan
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
| | - Yun Luo
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
| | - Xiaoyu Zhang
- College of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Xuyong Yang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China
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32
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Leng J, Wang T, Zhao X, Ong EWY, Zhu B, Ng JDA, Wong YC, Khoo KH, Tamada K, Tan ZK. Thermodynamic Control in the Synthesis of Quantum-Confined Blue-Emitting CsPbBr 3 Perovskite Nanostrips. J Phys Chem Lett 2020; 11:2036-2043. [PMID: 32090569 DOI: 10.1021/acs.jpclett.9b03873] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Size control is critical in the synthesis of quantum-confined semiconductor nanocrystals, otherwise known as quantum dots. The achievement of size-uniformity and narrow spectral line-width in quantum dots conventionally relies on a very precise kinetic control of the reactions, where reaction time plays a significant role in defining the final crystal sizes and distribution. Here, we show that synthesis of quantum-confined perovskite nanostrips could be achieved through a thermodynamically controlled reaction, using a low-temperature and ligand-rich approach. The nanostrip growth proceeds through an initial one-dimensional (1D) nanorod stage, followed by the lateral widening of the rod to form a two-dimensional (2D) nanostrip. The spectral characteristics of the final product remain unchanged after prolonged reaction, indicating no signs of crystal ripening and confirming the thermodynamic nature of this reaction. The CsPbBr3 perovskite nanostrips were highly uniform and emit at a deep-blue wavelength of 462 nm with a remarkably narrow line-width of 13 nm. This corresponds to color coordinates of (0.136, 0.049) on the CIE 1931 color space, which fulfils the stringent Rec. 2020 standard for next-generation color displays. The well-passivated nanostrips also possess negligible defects and provide a near-unity photoluminescence quantum yield at 94%. Crucially, the achievement of blue emission through a pure-halide perovskite circumvents the problems of spectral instability that are frequently experienced in mixed-halide perovskite systems. The convenience and scalability of our thermodynamic approach, coupled with the excellent optical attributes, would likely enable these quantum-confined perovskite systems to be the preferred method toward color control in trichromatic display applications.
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Affiliation(s)
- Junfu Leng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
| | - Tian Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Xiaofei Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Evon Woan Yuann Ong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, 117574 Singapore
| | - Baisheng Zhu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Jun De Andrew Ng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, 117574 Singapore
| | - Ying-Chieh Wong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Khoong Hong Khoo
- Institute of High Performance Computing, 1 Fusionopolis Way, 138632 Singapore
| | - Kaoru Tamada
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
| | - Zhi-Kuang Tan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, 117574 Singapore
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Wei Y, Zheng W, Shahid MZ, Jiang Z, Li Y, Duan Z, Liu G, Hu X, Li C. A CTAB-mediated antisolvent vapor route to shale-like Cs 4PbBr 6 microplates showing an eminent photoluminescence. RSC Adv 2020; 10:10023-10029. [PMID: 35498579 PMCID: PMC9050374 DOI: 10.1039/c9ra10987k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 03/04/2020] [Indexed: 11/22/2022] Open
Abstract
Compared with nanoscale quantum dots (QDs), the large-sized perovskite crystals not only possess better stability but also are convenient for application exploration. Herein, we develop a facile and efficient antisolvent vapor-assisted recrystallization approach for the synthesis of large-sized Cs4PbBr6 perovskite crystal microplates. In this method, for the first time, the shale-like Cs4PbBr6 microplates with lateral dimensions of hundreds of microns are fabricated by employing cetyltriethylammnonium bromide (CTAB) as a morphology-directing agent. FESEM, TEM, and AFM characterizations indicate that the as-obtained shale-like Cs4PbBr6 microplates are actually formed by 6–8 nm thick Cs4PbBr6 nanosheets with orientational stacking. Importantly, such highly crystalline Cs4PbBr6 microplates with shale-like morphology exhibit a narrow and intense green PL emission with a 59% PL quantum yield. Moreover, the planar structure of shale-like Cs4PbBr6 microplates makes it easy to form a preferred orientation on a substrate, which endow them with promising potential in optoelectronic devices such as lighting and displays. Highly luminescent shale-like Cs4PbBr6 microplates with hundreds of microns in lateral dimension and formed by thin nanosheets with orientational stacking.![]()
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Affiliation(s)
- Yunwei Wei
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in University of Shandong, School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Wei Zheng
- School of Materials Science and Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Malik Zeeshan Shahid
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in University of Shandong, School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Zhixiang Jiang
- School of Materials Science and Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Yuehua Li
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in University of Shandong, School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Zhongyao Duan
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in University of Shandong, School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Guangning Liu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in University of Shandong, School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Xun Hu
- School of Materials Science and Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Cuncheng Li
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in University of Shandong, School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
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34
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Lin C, Liu L, Xu J, Fang F, Jiang K, Liu Z, Wang Y, Chen F, Yao H. Facile synthesis of a dual-phase CsPbBr3–CsPb2Br5 single crystal and its photoelectric performance. RSC Adv 2020; 10:20745-20752. [PMID: 35517769 PMCID: PMC9054283 DOI: 10.1039/d0ra01239d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/25/2020] [Indexed: 11/21/2022] Open
Abstract
The emerging metal-halide perovskites are promising for next generation optoelectronic devices. Recently, all-inorganic halide perovskites have been developed and show significantly improved stability compared with organic–inorganic hybrid halide perovskites. Here, we report a facile method based on the coffee ring effect of solvents to synthesize dual-phase CsPbBr3–CsPb2Br5 single crystal microsheets for the first time. The prepared dual-phase CsPbBr3–CsPb2Br5 single crystal is composed of a tetragonal crystalline phase of CsPb2Br5 and a monoclinic phase of CsPbBr3 according to X-ray diffraction (XRD) patterns. The sharp XRD peaks indicate the high crystallinity of the as-synthesized dual-phase CsPbBr3–CsPb2Br5 microsheets. CsPbBr3 is mainly distributed on the edge of the microsheets based on photoluminescence (PL) mapping images. Besides, a photodetector based on the dual-phase CsPbBr3–CsPb2Br5 microsheets exhibits good performance with a high on/off photocurrent ratio of 300 and a photoresponsivity of 2.68 mA W−1. The rise and decay times of the CsPbBr3–CsPb2Br5 microsheet photodetector are around 25.3 ms and 29.6 ms, respectively. The experimental results indicate that the dual-phase CsPbBr3–CsPb2Br5 microsheet could be a good candidate for the fabrication of high-performance micro photodetectors compatible with practical applications. Dual-phase CsPbBr3–CsPb2Br5 single crystal microsheets were synthesized by a simple method based on the coffee ring effect.![]()
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Affiliation(s)
- Congjian Lin
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Lai Liu
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Jinzhuo Xu
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Feier Fang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Ke Jiang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Zexiang Liu
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Ye Wang
- Key Laboratory of Material Physics of Ministry of Education
- School of Physics and Engineering
- Zhengzhou University
- Zhengzhou 450052
- China
| | - Fuming Chen
- School of Physics and Telecommunication Engineering
- South China Normal University
- Guangzhou 510006
- China
| | - Huizhen Yao
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
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35
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Xiong W, Zhang Z, Huang Y, Xu C, Wu J, Li L, Zheng F, Wu X. A microwave-assisted template-free route for large-scale synthesis of photoluminescent single crystal CsPbI3 nanotubes. CrystEngComm 2020. [DOI: 10.1039/c9ce01722d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-quality single crystalline CsPbI3 nanotubes featuring highly uniform sizes and stable and bright photoluminescence were synthesized through a microwave-assisted synthetic approach.
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Affiliation(s)
- Weiwei Xiong
- School of Environmental & Chemical Engineering
- Jiangsu University of Science and Technology Zhenjiang
- P. R. China
| | - Ziyi Zhang
- School of Chemistry & Chemical Engineering Nanjing University Nanjing
- P. R. China
| | - Yutao Huang
- School of Chemistry & Chemical Engineering Nanjing University Nanjing
- P. R. China
| | - Chenxin Xu
- School of Environmental & Chemical Engineering
- Jiangsu University of Science and Technology Zhenjiang
- P. R. China
| | - Jiajing Wu
- School of Chemistry & Chemical Engineering Nanjing University Nanjing
- P. R. China
| | - Lingling Li
- School of Chemistry & Chemical Engineering Nanjing University Nanjing
- P. R. China
| | - Fenfen Zheng
- School of Environmental & Chemical Engineering
- Jiangsu University of Science and Technology Zhenjiang
- P. R. China
| | - Xingcai Wu
- School of Chemistry & Chemical Engineering Nanjing University Nanjing
- P. R. China
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36
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Mixed-Solvent Polarity-Assisted Phase Transition of Cesium Lead Halide Perovskite Nanocrystals with Improved Stability at Room Temperature. NANOMATERIALS 2019; 9:nano9111537. [PMID: 31671551 PMCID: PMC6915538 DOI: 10.3390/nano9111537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/10/2019] [Accepted: 10/28/2019] [Indexed: 01/28/2023]
Abstract
Cesium lead halide perovskite nanocrystals (NCs) have attracted enormous interest in light-emitting diode, photodetector and low-threshold lasing application in terms of their unique optical and electrical performance. However, little attention has been paid to other structures associated with CsPbBr3, such as CsPb2Br5. Herein, we realize a facile method to prepare dual-phase NCs with improved stability against polar solvents by replacing conventional oleylamine with cetyltrimethyl ammonium bromide (CTAB) in the reprecipitation process. The growth of NCs can be regulated with different ratios of toluene and ethanol depending on solvent polarity, which not only obtains NCs with different sizes and morphologies, but also controls phase transition between orthorhombic CsPbBr3 and tetragonal CsPb2Br5. The photoluminescence (PL) and defect density calculated exhibit considerable solvent polarity dependence, which is ascribed to solvent polarity affecting the ability of CTAB to passivate surface defects and improve stoichiometry in the system. This new synthetic method of perovskite material will be helpful for further studies in the field of lighting and detectors.
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37
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Liu X, Zhang X, Li L, Xu J, Yu S, Gong X, Zhang J, Yin H. Stable Luminescence of CsPbBr 3/ nCdS Core/Shell Perovskite Quantum Dots with Al Self-Passivation Layer Modification. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40923-40931. [PMID: 31588719 DOI: 10.1021/acsami.9b14967] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Perovskite quantum dots (PQDs) are among the most important luminescent semiconducting materials; however, they are unstable. Exposure to light, heat, and air can lead to irreversible degradation, which results in fluorescence quenching. Therefore, defects in PQDs significantly limit their practical application. Herein, we describe a simple method to enhance the photostability of CsPbBr3/nCdS QDs, which involves doping their shells with aluminum. The temperature-dependent photoluminescence (PL) of colloidal CsPbBr3/nCdS/Al2O3 QDs is investigated, and the thermal quenching of PL, blue shift of the optical band gap, and PL line width broadening are observed in each QD sample. Al2O3 layers on the CsPbBr3/nCdS QDs can effectively prevent photodegradation. Nonlinear, temperature-dependent exciton-phonon coupling and lattice dilation leads to radiative and nonradiative relaxation processes at temperatures ranging from 10 to 300 K; moreover, changes in the band gap and PL spectral line broadening are observed.
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Affiliation(s)
- Xin Liu
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Xiaosong Zhang
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Lan Li
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Jianping Xu
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Shuili Yu
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Xiaokai Gong
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Jiajia Zhang
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
| | - Hao Yin
- School of Materials Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, and National Demonstration Center for Experimental Function Materials Education , Tianjin University of Technology , Tianjin 300384 , China
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38
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Zhou YQ, Xu J, Liu JB, Liu BX. Green Emission Induced by Intrinsic Defects in All-Inorganic Perovskite CsPb 2Br 5. J Phys Chem Lett 2019; 10:6118-6123. [PMID: 31538483 DOI: 10.1021/acs.jpclett.9b02367] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
All-inorganic perovskites with improved stability are expected to be better candidates for optoelectronics, compared to organic-inorganic hybrid perovskites. A new member of all-inorganic perovskites, CsPb2Br5, has attracted great attention for its promising applications in optoelectronic devices. However, the origins of the green emission in CsPb2Br5 have been actively debated. By using first-principles calculations, we find that CsPb and VBr are dominant intrinsic defects independent of the growth conditions within the stable region of CsPb2Br5. Interestingly, we suggest that individual intrinsic defects do not lead to the green emission of CsPb2Br5, while the donor-acceptor pair recombination of CsPb and VBr possibly does. Our findings provide new insights into the experimental controversy about the green emission and its origins in CsPb2Br5 from the perspective of intrinsic defects, which help to extend the application of CsPb2Br5 in optoelectronic devices.
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Affiliation(s)
- Yu-Qian Zhou
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Jian Xu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Jian-Bo Liu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Bai-Xin Liu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
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39
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Rosa-Pardo I, Pocoví-Martínez S, Arenal R, Galian RE, Pérez-Prieto J. Ultrathin lead bromide perovskite platelets spotted with europium(ii) bromide dots. NANOSCALE 2019; 11:18065-18070. [PMID: 31577322 DOI: 10.1039/c9nr06631d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We describe here the preparation of a novel nanohybrid comprising a two-layer cesium lead bromide nanoplatelet, [CsPbBr3]PbBr4 NPL, containing europium(ii) bromide (EuBr2) nanodots, by ultrasound/heating treatment of toluene dispersions of the CsPbBr3 nanomaterial in the presence of EuBr2 nanodots. The hybrid nanoplatelets exhibit strong excitonic and narrow emission peaks characteristic of ultrathin NPLs at 430 and 436 nm, respectively.
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Affiliation(s)
- Ignacio Rosa-Pardo
- Instituto de Ciencia Molecular (ICMol), University of Valencia, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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40
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Liu S, Chen T. Synthesis and luminescent properties of polymer‐silica multilayer‐encapsulated perovskite quantum dots for optoelectronics. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201800432] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Shuang‐De Liu
- Department of Applied ChemistryNational Chiao Tung University Hsinchu Taiwan
| | - Teng‐Ming Chen
- Department of Applied ChemistryNational Chiao Tung University Hsinchu Taiwan
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41
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Stability of Hybrid Organic-Inorganic Perovskite CH 3NH 3PbBr 3 Nanocrystals under Co-Stresses of UV Light Illumination and Temperature. NANOMATERIALS 2019; 9:nano9081158. [PMID: 31412580 PMCID: PMC6724138 DOI: 10.3390/nano9081158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/07/2019] [Accepted: 08/09/2019] [Indexed: 11/16/2022]
Abstract
Hybrid organic–inorganic metal halide perovskite nanocrystals (NCs) are among the candidates for color conversion materials in displays, especially in NC-based micro-light-emitting diode (micro-LED) displays. However, these NCs are still lacking long-term stability, which has hindered their large-scale applications. We mimic the working conditions, which include ultraviolet light illumination at 323 K and three different types of atmosphere (N2, vacuum, and air), respectively, to investigate the stability of CH3NH3PbBr3 NCs embedded in the polyvinylidene fluoride matrix. X-ray diffraction results indicate the generation of NH4Pb2Br5, which is produced from the encapsulated CH3NH3PbBr3 NCs in all three atmospheres, and the decomposition generates a large amount of accompanying interface defects at the surface area of NCs, resulting in the significant decrease of the photoluminescence (PL) intensity. This work highlights the stability-related mechanism of CH3NH3PbBr3 NCs under combined external stresses that mimic operating conditions. In addition, this work also suggests a new method for conducting aging tests and contributes to developing effective routes towards higher stability of perovskite NCs.
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42
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Wang C, Wang Y, Su X, Hadjiev VG, Dai S, Qin Z, Calderon Benavides HA, Ni Y, Li Q, Jian J, Alam MK, Wang H, Robles Hernandez FC, Yao Y, Chen S, Yu Q, Feng G, Wang Z, Bao J. Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902492. [PMID: 31231895 DOI: 10.1002/adma.201902492] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/07/2019] [Indexed: 05/06/2023]
Abstract
Since the first report of the green emission of 2D all-inorganic CsPb2 Br5 , its bandgap and photoluminescence (PL) origin have generated intense debate and remained controversial. After the discovery that PL centers occupy only specific morphological structures in CsPb2 Br5 , a two-step highly sensitive and noninvasive optical technique is employed to resolve the controversy. Same-spot Raman-PL as a static property-structure probe reveals that CsPbBr3 nanocrystals are contributing to the green emission of CsPb2 Br5 ; pressure-dependent Raman-PL with a diamond anvil cell as a dynamic probe further rules out point defects such as Br vacancies as an alternative mechanism. Optical absorption under hydrostatic pressure shows that the bandgap of CsPb2 Br5 is 0.3-0.4 eV higher than previously reported values and remains nearly constant with pressure up to 2 GPa in good agreement with full-fledged density functional theory (DFT) calculations. Using ion exchange of Br with Cl and I, it is further proved that CsPbBr3- x Xx (X = Cl or I) is responsible for the strong visible PL in CsPb2 Br5- x Xx . This experimental approach is applicable to all PL-active materials to distinguish intrinsic defects from extrinsic nanocrystals, and the findings pave the way for new design and development of highly efficient optoelectronic devices based on all-inorganic lead halides.
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Affiliation(s)
- Chong Wang
- School of Materials Science and Engineering, Yunnan University, Kunming, Yunnan, 650500, China
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Yanan Wang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Xinghua Su
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- School of Materials Science and Engineering, Chang'an University, Xi'an, Shaanxi, 710061, China
| | - Viktor G Hadjiev
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shenyu Dai
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Zhaojun Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | | | - Yizhou Ni
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Department of Physics, University of Houston, Houston, TX, 77204, USA
| | - Qiang Li
- Department of Materials Engineering, Purdue University West Lafayette, IN, 47907, USA
| | - Jie Jian
- Department of Materials Engineering, Purdue University West Lafayette, IN, 47907, USA
| | - Md Kamrul Alam
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA
| | - Haiyan Wang
- Department of Materials Engineering, Purdue University West Lafayette, IN, 47907, USA
| | - Francisco C Robles Hernandez
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Mechanical Engineering Technology, University of Houston, Houston, TX, 77204, USA
| | - Yan Yao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shuo Chen
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Department of Physics, University of Houston, Houston, TX, 77204, USA
| | - Qingkai Yu
- Ingram School of Engineering, Texas State University, San Marcos, TX, 78666, USA
| | - Guoying Feng
- College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Jiming Bao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA
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43
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Lou S, Zhou Z, Xuan T, Li H, Jiao J, Zhang H, Gautier R, Wang J. Chemical Transformation of Lead Halide Perovskite into Insoluble, Less Cytotoxic, and Brightly Luminescent CsPbBr 3/CsPb 2Br 5 Composite Nanocrystals for Cell Imaging. ACS APPLIED MATERIALS & INTERFACES 2019; 11:24241-24246. [PMID: 31245989 DOI: 10.1021/acsami.9b05484] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Lead halide perovskite nanocrystals (NCs) have been widely investigated owing to their potential applications as optoelectronic devices. However, these materials suffer from poor water stability, which make them impossible to be applied in biomedicine. Here, insoluble CsPbBr3/CsPb2Br5 composite NCs were successfully synthesized via simple water-assisted chemical transformation of perovskite NCs. Water plays two key roles in this synthesis: (i) stripping CsBr from CsPbBr3/Cs4PbBr6 and (ii) modifying the coordination number of Pb2+ (six in CsPbBr3 and Cs4PbBr6 vs eight in CsPb2Br5). The as-prepared CsPbBr3/CsPb2Br5 composite NCs not only retain the photoluminescence quantum yield (up to 80%) and a narrow full width to half-maximum of 16 nm, but also present excellent water stability and low cytotoxicity. With these properties, the CsPbBr3/CsPb2Br5 composite NCs were demonstrated as efficient fluorescent probes in live HeLa cells. We believe that our finding not only provides a new method to prepare insoluble, narrow-band, and brightly luminescent CsPbBr3/CsPb2Br5 composite NCs, but also extend the potential applications of lead halides in biomedicine.
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Affiliation(s)
- Sunqi Lou
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
| | - Zhi Zhou
- Hunan Provincial Engineering Technology Research Center for Optical Agriculture College of Science , Hunan Agricultural University , Changsha 410128 , China
| | - Tongtong Xuan
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
| | - Huili Li
- Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science , East China Normal University , Shanghai 200062 , China
| | - Ju Jiao
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
| | - Hongwu Zhang
- Key Lab of Urban Pollutant Conversion , Institute of Urban Environment, Chinese Academy of Sciences , Xiamen , Fujian 361021 , China
| | - Romain Gautier
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
- Institut des Matériaux Jean Rouxel (IMN) , Université de Nantes , 2 rue de la Houssinière , BP 32229, 44322 Nantes cedex 3 , France
| | - Jing Wang
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
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44
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Sharma SK, Mamgain S, Attarwala B, Yella A. ZnX 2 mediated post-synthetic transformation of zero dimensional Cs 4PbBr 6 nanocrystals for opto-electronic applications. NANOSCALE ADVANCES 2019; 1:2502-2509. [PMID: 36132732 PMCID: PMC9418536 DOI: 10.1039/c9na00244h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 05/08/2019] [Indexed: 05/30/2023]
Abstract
Herein we demonstrate a facile approach for the synthesis of all inorganic cesium lead halide perovskite nanocrystal composites CsPbX3 (X = Cl, Br, I) with high quantum yield by post-synthetic modulation of zero dimensional Cs4PbBr6 nanocrystals with ZnX2 salts. The transformation of Cs4PbBr6 nanocrystals into CsPbBr3 takes place in two steps, the first step being the surface modification of the Cs4PbBr6 nanocrystals with Zn2+ ions and the second step being extraction of CsBr by the Zn2+ ions resulting in the formation of composite Cs4PbBr6/CsPbBr3 nanocrystals. The transformed composite nanocrystals were found to have a PL QY exceeding 90% and the shape of the nanocrystals also changed from hexagonal to cubic shaped. Owing to the highly ionic nature of the nanocrystals, complete anion exchange could be also realized using ZnI2 salt. In the case of the iodide post-treated samples, nanorods were obtained which exhibited bright red photoluminescence. Photodetectors based on the ZnI2 treated Cs4PbBr6 NCs were fabricated, and the photodetectors exhibited a high on/off ratio with a fast response time. The excellent optoelectronic properties make this treatment versatile for a wide range of functional optoelectronic devices like light emitting diodes and photovoltaic devices.
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Affiliation(s)
- Sumit Kumar Sharma
- Centre for Research in Nanotechnology and Science, Indian Institute of Technology Bombay 400076 India
| | - Swati Mamgain
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay 400076 India
| | - Burhanuddin Attarwala
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay 400076 India
| | - Aswani Yella
- Centre for Research in Nanotechnology and Science, Indian Institute of Technology Bombay 400076 India
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay 400076 India
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45
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Brintakis K, Gagaoudakis E, Kostopoulou A, Faka V, Argyrou A, Binas V, Kiriakidis G, Stratakis E. Ligand-free all-inorganic metal halide nanocubes for fast, ultra-sensitive and self-powered ozone sensors. NANOSCALE ADVANCES 2019; 1:2699-2706. [PMID: 36132711 PMCID: PMC9419230 DOI: 10.1039/c9na00219g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 05/22/2019] [Indexed: 05/30/2023]
Abstract
Ligand-free all-inorganic lead halide nanocubes have been investigated as ozone sensing materials operating at room temperature. It is found that the nanocubes, crystallined in the orthorhombic CsPbBr3 structure, can operate at room temperature, be self-powered and exhibit high sensitivity and remarkable repeatability. More importantly, they demonstrate higher sensitivity (54% in 187 ppb) and faster response and recovery times compared to hybrid lead mixed halide perovskite (CH3NH3PbI3-x Cl x ) layers, which is the only lead halide perovskite material tested for ozone sensing, to date. Following the exposure to an ozone environment, the stoichiometry and the morphology of the nanocubes remain unaltered. The facile and easy fabrication process together with the high responsivity and stability to the ozone environment makes the bare CsPbBr3 nanocubes a promising material for sensing applications. The sensing properties of the nanoparticulate metal halides presented here provide new exciting opportunities towards engineering reliable and cheap sensing elements for room-temperature operated and self-powered sensors.
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Affiliation(s)
- K Brintakis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
| | - E Gagaoudakis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
| | - A Kostopoulou
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
| | - V Faka
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
- University of Crete, Department of Materials Science and Technology 710 03 Heraklion Crete Greece
| | - A Argyrou
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Materials Science and Technology 710 03 Heraklion Crete Greece
| | - V Binas
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
- Crete Center for Quantum Complexity and Nanotechnology, Department of Physics, University of Crete 71003 Heraklion Greece
| | - G Kiriakidis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
| | - E Stratakis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
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Zou S, Liu C, Li R, Jiang F, Chen X, Liu Y, Hong M. From Nonluminescent to Blue-Emitting Cs 4 PbBr 6 Nanocrystals: Tailoring the Insulator Bandgap of 0D Perovskite through Sn Cation Doping. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1900606. [PMID: 31058382 DOI: 10.1002/adma.201900606] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 04/11/2019] [Indexed: 05/25/2023]
Abstract
All-inorganic cesium lead halide perovskite nanocrystals (NCs) with different dimensionalities have recently fascinated the research community due to their extraordinary optoelectronic performance such as tunable bandgaps over the entire visible spectral region. However, compared to well-developed 3D CsPbX3 perovskites (X = Cl, Br, and I), the bandgap tuning in 0D Cs4 PbX6 perovskite NCs remains an arduous task. Herein, a simple but valid strategy is proposed to tailor the insulator bandgap (≈3.96 eV) of Cs4 PbBr6 NCs to the blue spectral region by changing the local coordination environment of isolated [PbBr6 ]4- octahedra in the Cs4 PbBr6 crystal through Sn cation doping. Benefitting from the unique Pb2+ -poor and Br- -rich reaction environment, the Sn cation is successfully introduced into the Cs4 PbBr6 NCs, forming coexisting point defects comprising substitutional SnPb and interstitial Bri , thereby endowing these theoretically nonluminescent Cs4 PbBr6 NCs with an ultranarrow blue emission at ≈437 nm (full width at half maximum, ≈12 nm). By combining the experimental results with first-principles calculations, an unusual electronic dual-bandgap structure, comprising the newly emerged semiconducting bandgap of ≈2.87 eV and original insulator bandgap of ≈3.96 eV, is found to be the underlying fundamental reason for the ultranarrow blue emission.
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Affiliation(s)
- Shenghan Zou
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Caiping Liu
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Renfu Li
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Feilong Jiang
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Xueyuan Chen
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, China
| | - Yongsheng Liu
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Maochun Hong
- CAS Key Laboratory of Design and Assembly of Functional, Nanostructures, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, China
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47
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Bao J, Hadjiev VG. Origin of Luminescent Centers and Edge States in Low-Dimensional Lead Halide Perovskites: Controversies, Challenges and Instructive Approaches. NANO-MICRO LETTERS 2019; 11:26. [PMID: 34137990 PMCID: PMC7770881 DOI: 10.1007/s40820-019-0254-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 02/21/2019] [Indexed: 05/23/2023]
Abstract
With only a few deep-level defect states having a high formation energy and dominance of shallow carrier non-trapping defects, the defect-tolerant electronic and optical properties of lead halide perovskites have made them appealing materials for high-efficiency, low-cost, solar cells and light-emitting devices. As such, recent observations of apparently deep-level and highly luminescent states in low-dimensional perovskites have attracted enormous attention as well as intensive debates. The observed green emission in 2D CsPb2Br5 and 0D Cs4PbBr6 poses an enigma over whether it is originated from intrinsic point defects or simply from highly luminescent CsPbBr3 nanocrystals embedded in the otherwise transparent wide band gap semiconductors. The nature of deep-level edge emission in 2D Ruddlesden-Popper perovskites is also not well understood. In this mini review, the experimental evidences that support the opposing interpretations are analyzed, and challenges and root causes for the controversy are discussed. Shortcomings in the current density functional theory approaches to modeling of properties and intrinsic point defects in lead halide perovskites are also noted. Selected experimental approaches are suggested to better correlate property with structure of a material and help resolve the controversies. Understanding and identification of the origin of luminescent centers will help design and engineer perovskites for wide device applications.
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Affiliation(s)
- Jiming Bao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA.
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA.
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA.
| | - Viktor G Hadjiev
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA.
- Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA.
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48
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Shamsi J, Urban AS, Imran M, De Trizio L, Manna L. Metal Halide Perovskite Nanocrystals: Synthesis, Post-Synthesis Modifications, and Their Optical Properties. Chem Rev 2019; 119:3296-3348. [PMID: 30758194 PMCID: PMC6418875 DOI: 10.1021/acs.chemrev.8b00644] [Citation(s) in RCA: 560] [Impact Index Per Article: 112.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Indexed: 01/17/2023]
Abstract
Metal halide perovskites represent a flourishing area of research, which is driven by both their potential application in photovoltaics and optoelectronics and by the fundamental science behind their unique optoelectronic properties. The emergence of new colloidal methods for the synthesis of halide perovskite nanocrystals, as well as the interesting characteristics of this new type of material, has attracted the attention of many researchers. This review aims to provide an up-to-date survey of this fast-moving field and will mainly focus on the different colloidal synthesis approaches that have been developed. We will examine the chemistry and the capability of different colloidal synthetic routes with regard to controlling the shape, size, and optical properties of the resulting nanocrystals. We will also provide an up-to-date overview of their postsynthesis transformations, and summarize the various solution processes that are aimed at fabricating halide perovskite-based nanocomposites. Furthermore, we will review the fundamental optical properties of halide perovskite nanocrystals by focusing on their linear optical properties, on the effects of quantum confinement, and on the current knowledge of their exciton binding energies. We will also discuss the emergence of nonlinear phenomena such as multiphoton absorption, biexcitons, and carrier multiplication. Finally, we will discuss open questions and possible future directions.
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Affiliation(s)
- Javad Shamsi
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Alexander S. Urban
- Nanospectroscopy
Group, Department of Physics and Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität (LMU), Amalienstaße 54, 80799 Munich, Germany
| | - Muhammad Imran
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Luca De Trizio
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Kavli
Institute of Nanoscience and Department of Chemical Engineering, Delft University of Technology, PO Box 5, 2600AA Delft, The Netherlands
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Xu L, Li J, Fang T, Zhao Y, Yuan S, Dong Y, Song J. Synthesis of stable and phase-adjustable CsPbBr 3@Cs 4PbBr 6 nanocrystals via novel anion-cation reactions. NANOSCALE ADVANCES 2019; 1:980-988. [PMID: 36133201 PMCID: PMC9473259 DOI: 10.1039/c8na00291f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 12/23/2018] [Indexed: 05/07/2023]
Abstract
All-inorganic cesium lead halide perovskites have emerged as promising semiconductor materials due to their preeminent performance in lighting, display, light detecting, and laser fields. However, the applications of lead halide perovskites are limited by the dissatisfactory stability owing to their fragile ionic crystal characteristics and highly dynamic surface-coordinated states. The in situ diphase structure passivation possessing the same chemical constituents (such as passivating CsPbBr3 with Cs4PbBr6) has been proven to be an effective way to improve the stabilities and simultaneously maintain the highly efficient luminescence properties. Herein, for the first time, we report a novel anion-cation reaction method to synthesize the lead halide perovskite NCs with diphase CsPbBr3@Cs4PbBr6 structure. Moreover, we have found that the phase transformation between CsPbBr3 and Cs4PbBr6 is temperature dependent. Thus, we could control the relative composition of the diphase CsPbBr3@Cs4PbBr6 composite by adjusting the temperature. The optimized CsPbBr3@Cs4PbBr6 composite NCs achieve highly light emissive performance and stabilities against atmosphere, moisture and heating. Furthermore, we could obtain 135% of the NTSC color gamut through anion exchange. These highly emissive composite NCs with improved stabilities exhibit great potential in future optoelectronic fields.
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Affiliation(s)
- Leimeng Xu
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
| | - Jianhai Li
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
| | - Tao Fang
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
| | - Yongli Zhao
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
| | - Shichen Yuan
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
| | - Yuhui Dong
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
| | - Jizhong Song
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics and Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing 210094 China
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50
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Dutta A, Behera RK, Pal P, Baitalik S, Pradhan N. Near‐Unity Photoluminescence Quantum Efficiency for All CsPbX
3
(X=Cl, Br, and I) Perovskite Nanocrystals: A Generic Synthesis Approach. Angew Chem Int Ed Engl 2019; 58:5552-5556. [DOI: 10.1002/anie.201900374] [Citation(s) in RCA: 181] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Anirban Dutta
- Department of Materials Science, Technical Research CenterIndian Association for the Cultivation of Science, Jadavpur Kolkata 700032 India
| | - Rakesh Kumar Behera
- Department of Materials Science, Technical Research CenterIndian Association for the Cultivation of Science, Jadavpur Kolkata 700032 India
| | - Poulami Pal
- Inorganic Chemistry SectionDepartment of ChemistryJadavpur University Kolkata 700032 India
| | - Sujoy Baitalik
- Inorganic Chemistry SectionDepartment of ChemistryJadavpur University Kolkata 700032 India
| | - Narayan Pradhan
- Department of Materials Science, Technical Research CenterIndian Association for the Cultivation of Science, Jadavpur Kolkata 700032 India
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