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Ely F, Vieira KO, Reyes-Banda MG, Quevedo-Lopez M. Broadband photodetectors from silane-passivated CsPbBr 3 nanocrystals by ultrasound-mediated synthesis. NANOSCALE 2024; 16:10833-10840. [PMID: 38769851 DOI: 10.1039/d3nr06564b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Perovskite nanocrystals have excellent optical properties but suffer from environmental instability and production up-scaling which limit their commercial application. Here, we report the gram-scale ultrasound-mediated synthesis of silane passivated CsPbBr3 nanocrystals using (3-aminopropyl) triethoxysilane (APTS) as the primary surface ligand surface. The surface engineering endowed the CsPbBr3@SiOR NCs with extended environmental stability, a narrow emission bandwidth and a high photoluminescence quantum yield (PLQY > 75%). Thanks to these excellent optical properties, high-efficiency lateral and vertical photodetectors were fabricated. In particular, the layered vertical photodiode composed of ITO/Ga2O3/CsPbBr3/Au exhibited a broadband photoresponse from 350-700 nm with a responsivity peaking at 44.5.1 A W-1 and specific detectivity above 1013 Jones when illuminated at 470 nm wavelength and biased at +5 V. These results correspond to the best-in-class performance perovskite nanocrystal PD and confirm the extraordinary potential of CsPbBr3@SiOR for the development of efficient optoelectronic devices.
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Affiliation(s)
- Fernando Ely
- Renato Archer Information Technology Center - CTI, Campinas, SP, 13069-901, Brazil.
- Department of Materials Science & Engineering, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Kayo O Vieira
- Renato Archer Information Technology Center - CTI, Campinas, SP, 13069-901, Brazil.
| | - Martin G Reyes-Banda
- Department of Materials Science & Engineering, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Manuel Quevedo-Lopez
- Department of Materials Science & Engineering, The University of Texas at Dallas, Richardson, TX, 75080, USA
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2
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Shen J, Jia R, Hu Y, Zhu W, Yang K, Li M, Zhao D, Shi J, Lian J. Cold-Sintered All-Inorganic Perovskite Bulk Composite Scintillators for Efficient X-ray Imaging. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38710046 DOI: 10.1021/acsami.4c03124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Cost-effective bulk scintillators with high density, large-area, and long-term stability are desirable for high-energy radiation detections. Conventional bulk polycrystalline or single-crystal scintillators are generally synthesized by high-temperature approaches, and it is challenging to realize simultaneously high detectivity/responsivity, spatial resolution, and rapid time response. Here, we report the cold sintering of bulk scintillators (at 90 °C) based on an "emitter-in-matrix" principle, in which emissive CsPbBr3 nanocrystals are embedded in a durable and transparent Cs4PbBr6 matrix. These bulk scintillators exhibit high light yield (33,800 photons MeV-1), low detection limit (79 nGyair s-1), fast decay time (9.8 ns), and outstanding spatial resolution of 8.9 lp mm-1 to X-ray radiation and an energy resolution of 19.3% for γ-ray (59.6 keV) detection. The composite scintillator also shows exceptional stability against environmental degradation and cyclic X-ray radiation. Our results demonstrate a cost-effective strategy for developing perovskite-based bulk transparent scintillators with exceptional performance and high radioluminescence stability for high-energy radiation detection and imaging.
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Affiliation(s)
- Junhua Shen
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Ru Jia
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Yang Hu
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Weiguang Zhu
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Kun Yang
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Mingxin Li
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Dong Zhao
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Jian Shi
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Jie Lian
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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Zhou X, Bose R, Zhu X, Mehta A, Kim MJ, Malko AV. Highly Emissive Zero-Dimensional Cesium Lead Iodide Perovskite Nanocrystals with Thermally Activated Delayed Photoluminescence. J Phys Chem Lett 2023; 14:2933-2939. [PMID: 36930797 DOI: 10.1021/acs.jpclett.3c00219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We utilized a modified reverse-microemulsion method to develop highly emissive and photostable zero-dimensional (0D) Cs4Pb(Br1-xIx)6 perovskite nanocrystals (PNCs). We employed single-particle photoluminescence (PL) spectroscopy to explore blinking statistics and demonstrate single-photon emission from individual PNCs. Low-temperature blinking and photon correlation studies revealed a transition from single- to multiphoton emission with progressively longer "delayed" PL components, reaching ∼70 ns at room temperature and representing a distinctive behavior to previously known iodide PNCs. Such thermally activated PL emission is explained by the existence of defect-related "reservoir" states, feeding back into the PNC's emissive state and providing multiple photons within a single excitation cycle. This work establishes a new member in the 0D class of perovskite materials, studies its photophysical properties, and reveals its potential for future optoelectronic applications.
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Improving morphology and optoelectronic properties of ultra-wide bandgap perovskite via Cs tuning for clear solar cell and UV detection applications. Sci Rep 2023; 13:2965. [PMID: 36806248 PMCID: PMC9941583 DOI: 10.1038/s41598-023-29409-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/03/2023] [Indexed: 02/22/2023] Open
Abstract
With growing population, vertical spaces from skyscrapers are vast. Semi-transparent solar cells enable an effective pathway for vertical energy harvesting. With composition tunability, perovskite materials can be designed with different transparencies and colors. In this work, an ultra-high bandgap layered triple cation perovskite system was developed for the first time to meet the demand of clear optoelectronic applications; low dimensional triple cation perovskite thin films were fabricated using perovskite with the formula (PEA)2(CsxMA0.61-xFA0.39)39(Pb)40(Cl0.88-0.32xBr0.12+0.32x)121, 0 ≤ x ≤ 0.02 with DMSO as the appropriate solvent. The absorption edge of the material is around 410-430 nm, achieving great transparency to visible light. The structural, optical, and photovoltaic performances of the clear perovskite materials are explored with the variation of Cs contents via CsBr. The relation between thickness, transparency, and optoelectronic properties of the clear perovskite materials along with other physical properties were investigated. The highest photovoltaic conversion efficiency (PCE) of clear perovskite solar cells with 1.5% Cs was achieved to be 0.69% under xenon lamp irradiation at 100 mW/cm2 (1.5 mW/cm2 of UVA within 100 mW/cm2) and 5.24% under 365 nm UV irradiation at 2.4 mW/cm2. Photoresponsivity, external quantum efficiency (EQE), and detectivity were also determined for photodetector applications.
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Liang Z, Ni L, Zhang Y, Yuan C, Huang L, Yang Y, Xiao Y. Effects of Tellurium Doping on Environmental Stability and Luminous Performance of CsPbBr 3 Quantum Dots. ACS OMEGA 2022; 7:21800-21807. [PMID: 35785286 PMCID: PMC9245131 DOI: 10.1021/acsomega.2c01891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
The effects of elemental tellurium doping and decorating on the photoluminescence quantum yield (PL QY) and the environmental stability of the CsPbBr3 quantum dots (QDs) have been systematically studied. The PL spectra blue-shifts from 520 to 464 nm gradually with the increase in the amount of Te, and the full width at half-maximum (FWHM) increases from 20 to 62 nm and decreases to 27 nm accordingly. The morphology of the untreated samples has a rectangular shape with distinct boundaries, whereas the Te-doped samples have a semi-core-shell structure with partially coated CsPb2Br5 after tellurium doping. Furthermore, the apparent size of the nanocomposites increases to 20 nm, but the crystal size of the core decreases slightly according to the broadened peaks of X-ray diffraction (XRD). Further investigation by X-ray photoelectron spectroscopy shows that the binding energy of Pb-Br increases and Pb-Te bonds are formed in Te-doped samples, which can enhance the stability of QDs from the view of strengthening the chemical bonds and inhibiting the detaching behavior of bromine under moisture. At the nominal content of Pb/Te = 1:0.4, the thermal decomposition temperature of the QDs increases from 300 to 500 °C; the maximum of PL QY increases to 70% for the 1:0.4 sample and the relative PL peak intensity maintains 50% of the initial value after a 60 h aging simulation. Finally, the nanocomposite materials are fabricated into a white light-emitting device (WLED). Under the illumination of a commercial GaN chip, the device shows a good Commission Internationale de lEclairage (CIE) color coordination of (0.3291,0.3318).
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Zhao Y, Cheng F, Zhang S, Yang R, Li M, Ming H, Ye S. Formation mechanisms of CsPbBr 3/Cs 4PbBr 6 microscale composites assisted with imidazolium cations and their device applications. Dalton Trans 2022; 51:9445-9453. [PMID: 35678122 DOI: 10.1039/d2dt00842d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The instability of all-inorganic perovskite nanocrystals (NCs) remains a major challenge to their practical applications in displays and lighting. In order to improve their environmental resistance, highly luminescent CsPbBr3 NC embedded Cs4PbBr6 microcrystals (MCs) have been fabricated by an anti-solvent reprecipitation method with the assistance of 1-alkyl-3-methyl-imidazolium bromides. The heterostructure of the MCs is investigated in detail, and their formation mechanism is discussed in terms of the dissolution-precipitation equilibria and the total energy of variously scaled nanoparticles via density functional theory (DFT) calculations. Although the imidazolium ligands are not directly capping with the inner CsPbBr3 NCs, they are important to the formation of these MCs. The MCs exhibit better thermal resistance compared to conventional CsPbBr3 NCs prepared by the hot-injection method. Additionally, a prototype white light-emitting diode (WLED) was fabricated to demonstrate its practical application prospects. Thanks to the narrow emission bands and enhanced stability of the MCs, the WLED shows greater performance compared to bare perovskite NCs, indicating its great potential as a green phosphor in lighting and display applications.
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Affiliation(s)
- Yifei Zhao
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
| | - Fangrui Cheng
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
| | - Shuai Zhang
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
| | - Ruirui Yang
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
| | - Man Li
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
| | - Hong Ming
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
| | - Shi Ye
- State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510641, China.
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7
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Gull S, Jamil MH, Zhang X, Kwok H, Li G. Stokes Shift in Inorganic Lead Halide Perovskites: Current Status and Perspective. ChemistryOpen 2022; 11:e202100285. [PMID: 35147296 PMCID: PMC8889505 DOI: 10.1002/open.202100285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/18/2021] [Indexed: 11/08/2022] Open
Abstract
Inorganic metal halide perovskite system is considered as a promising candidate for applications from display to biomedical industry. Intrinsic inorganic lead halides possess small Stokes shift or self-absorption, providing negative impact for both photo voltaic and biomedical applications. Therefore, the development of an inorganic halide perovskite system with large Stokes shift is a significant venture. This review aims to provide an updated survey of the Stokes shift phenomena in the inorganic lead halide perovskites. The first section focuses about the mechanism, the second section gives different approaches in preparing inorganic perovskites with distinct Stokes shift, while the third section highlights the potential applications in both photovoltaic and biomedical areas. This review provides deep insight about the importance and usefulness of such phenomena in inorganic lead halides, essential for various applications.
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Affiliation(s)
- Sehrish Gull
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina
| | - M. Haris Jamil
- College of Electronics and Electrical EngineeringShenzhen UniversityShenzhenChina
| | - Xiuwen Zhang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina
| | - Hoi‐sing Kwok
- State Key Lab of Advanced Displays and Optoelectronics TechnologiesHong Kong University of Science and TechnologyClear Water BayKowloonHong Kong
| | - Guijun Li
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina
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8
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Li CT, Lee KL, Wang SF, Chen LC. Effect of a Rubidium Chloride Carrier Confinement Layer on the Characteristics of CsPbBr 3 Perovskite Light-Emitting Diodes. NANOSCALE RESEARCH LETTERS 2022; 17:2. [PMID: 34978612 PMCID: PMC8724480 DOI: 10.1186/s11671-021-03641-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
This work describes the effect of a rubidium chloride (RbCl) interlayer in CsPbBr3 perovskite light-emitting diode (LED) structures. RbCl crystallites exhibited polyhedral structures and lattice parameters similar to those of CsPbBr3 perovskite crystallites. The lattice mismatch between the RbCl interlayer and CsPbBr3 active layer was only approximately 2%. The devices exhibited the best quality and performance when RbCl was used as the nucleation and carrier confinement layer. The crystallite sizes of CsPbBr3 with 0.2-, 0.5-, and 1-nm-thick RbCl bottom layers were 55.1, 65.4, and 55.1 nm, respectively. The full width at half maximum (FWHM) of the photoluminescence (PL) emission peak for CsPbBr3 with the RbCl bottom layer was 0.096 eV.
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Affiliation(s)
- Chi-Ta Li
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106 Taiwan
| | - Kuan-Lin Lee
- Department of Electro-optical Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106 Taiwan
| | - Sea-Fue Wang
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106 Taiwan
| | - Lung-Chien Chen
- Department of Electro-optical Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei, 106 Taiwan
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Zhang Y, Zhang Z, Yu W, He Y, Chen Z, Xiao L, Shi J, Guo X, Wang S, Qu B. Lead-free Double Perovskite Cs 2 AgIn 0.9 Bi 0.1 Cl 6 Quantum Dots for White Light-Emitting Diodes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2102895. [PMID: 34841731 PMCID: PMC8805553 DOI: 10.1002/advs.202102895] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/17/2021] [Indexed: 05/26/2023]
Abstract
Perovskite-based optoelectronic devices have attracted considerable attention owing to their excellent device performances and facile solution processing. However, the toxicity and intrinsic instability of lead-based perovskites have limited their commercial development. Moreover, the provision of an efficient white emission from a single perovskite layer is challenging. Here, novel electrically excited white light-emitting diodes (WLEDs) based on lead-free double perovskite Cs2 AgIn0.9 Bi0.1 Cl6 quantum dots (QDs) without any phosphor are fabricated for the first time. Density functional theory calculations are carried out to clarify the mechanism of absorption and recombination in Cs2 AgIn0.9 Bi0.1 Cl6 with Bi-doping breaking the parity-forbidden transition of the direct bandgap. Microzone optical and electronic characterizations reveal that the broadband emission of Cs2 AgIn0.9 Bi0.1 Cl6 QDs originates from self-trapped excitons, and luminescent properties are unchanged after the film deposition. The QD-WLED exhibits excellent Commission Internationale de L'Eclairage color coordinates, correlated color temperature and relatively high color rendering index of (0.32, 0.32), 6432 K, and 94.5, respectively. The maximum luminance of 158 cd m-2 is achieved by triphenylphosphine oxide passivation, and this lead-free QD-WLED exhibits a superior stability in ambient air with a long T50 ≈48.53 min. Therefore, lead-free perovskite Cs2 AgIn0.9 Bi0.1 Cl6 QDs are promising candidates for use in WLEDs in the future.
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Affiliation(s)
- Yuqing Zhang
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Zehao Zhang
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Wenjin Yu
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Yong He
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Zhijian Chen
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Lixin Xiao
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Jun‐jie Shi
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Xuan Guo
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of EducationFujian Provincial Key Laboratory for Photonics TechnologyFujian Normal UniversityFuzhou350007P. R. China
| | - Shufeng Wang
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
| | - Bo Qu
- State Key Laboratory for Artificial Microstructures and Mesoscopic PhysicsDepartment of PhysicsPeking UniversityBeijing100871P. R. China
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10
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Abstract
This review provides in-depth insight into the structure–luminescence–application relationship of 0D all-inorganic/organic–inorganic hybrid metal halide luminescent materials.
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Affiliation(s)
- Mingze Li
- The State Key Laboratory of Luminescent Materials and Devices
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou
| | - Zhiguo Xia
- The State Key Laboratory of Luminescent Materials and Devices
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou
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11
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Xu WL, Bradley SJ, Xu Y, Zheng F, Hall CR, Ghiggino KP, Smith TA. Highly efficient radiative recombination in intrinsically zero-dimensional perovskite micro-crystals prepared by thermally-assisted solution-phase synthesis. RSC Adv 2020; 10:43579-43584. [PMID: 35519665 PMCID: PMC9058417 DOI: 10.1039/d0ra08890k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/23/2020] [Indexed: 12/02/2022] Open
Abstract
Zero-dimensional (0D) quantum confinement can be achieved in perovskite materials by the confinement of electron and hole states to single PbX6 4- perovskite octahedra. In this work, 0D perovskite (Cs4PbBr6) micro-crystals were prepared by a simple thermally-assisted solution method and thoroughly characterized. The micro-crystals show a high level of crystallinity and a high photoluminescence quantum yield of 45%. The radiative recombination coefficient of the 0D perovskite micro-crystals, 1.5 × 10-8 s-1 cm3, is two orders of magnitude higher than that of typical three-dimensional perovskite and is likely a strong contributing factor to the high emission efficiency of 0D perovskite materials. Temperature dependent luminescence measurements provide insight into the role of thermally-activated trap states. Spatially resolved measurements on single 0D perovskite micro-crystals reveal uniform photoluminescence intensity and emission decay behaviour suggesting the solution-based fabrication method yields a high-quality and homogenous single-crystal material. Such uniform emission reflects the intrinsic 0D nature of the material, which may be beneficial to device applications.
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Affiliation(s)
- Wei-Long Xu
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
- School of Photoelectric Engineering, Changzhou Institute of Technology Changzhou Jiangsu 213002 China
| | - Siobhan J Bradley
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Yang Xu
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Fei Zheng
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Christopher R Hall
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Kenneth P Ghiggino
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Trevor A Smith
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
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12
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Mandal P, Roy A, Mannar S, Viswanatha R. Growth mechanistic insights into perovskite nanocrystals: dimensional growth. NANOSCALE ADVANCES 2020; 2:5305-5311. [PMID: 36132029 PMCID: PMC9419595 DOI: 10.1039/d0na00732c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 09/16/2020] [Indexed: 06/15/2023]
Abstract
The optical and electronic properties of lead halide perovskite nanocrystals have been explored extensively due to their increasing demand in photovoltaic and optoelectronic applications. But little is known about the growth kinetics of these nanocrystals. In this work, we demonstrate an interesting new mechanism using the method of arrested growth and precipitation to isolate the intermediates. We find that growth is driven by oriented attachment competing with the surface energetics. Hence, we observe a rare example of self-assembly driven dimensional growth characterized by suitable surface passivation that competes with the exposed surface facets through dimensional growth. This provides an explanation for not only the lack of size and shape tunability but also the emergence of a cubic shape rather than commonly observed spherical shapes in nanocrystals. Additionally, we find that this also corresponds to the observed phase transitions as well as correlating with pathways of decay of the photoluminescence spectra.
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Affiliation(s)
- Prasenjit Mandal
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
- School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
| | - Angira Roy
- International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
| | - Subhashri Mannar
- International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
| | - Ranjani Viswanatha
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
- International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
- School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore 560064 India
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13
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Shankar H, Bansal P, Yu WW, Kar P. Aqueous Precursor Induced Morphological Change and Improved Water Stability of CsPbBr 3 Nanocrystals. Chemistry 2020; 26:12242-12248. [PMID: 32584442 DOI: 10.1002/chem.202002499] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Indexed: 11/08/2022]
Abstract
In the literature, lead halide perovskites are very notable for their degradation in the presence of polar solvents, such as water. In contrast, in this research, it is observed that adding a minor amount of water into the precursor solution can improve the stability and photoluminescence quantum yield of CsPbBr3 nanocrystals through a ligand-assisted reprecipitation (LARP) method. In this way, the shape and phase transformation from CsPbBr3 nanoplates to CsPbBr3 /Cs4 PbBr6 nanorods and Cs4 PbBr6 nanowires can be controlled with increasing water content in the precursor solution. Upon adding water up to an ideal amount, CsPbBr3 maintains its phase and nanoplate morphology. The key role of water amount for tuning the crystallinity, stability, morphology, optical properties, and phase transformation of cesium lead halide perovskite nanocrystals will be beneficial in the future commercialization of optoelectronics.
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Affiliation(s)
- Hari Shankar
- Department of Chemistry, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India
| | - Parul Bansal
- Department of Chemistry, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India.,Department of Chemistry and Physics, Louisiana State University, Shreveport, Louisiana, 71115, United States
| | - William W Yu
- Department of Chemistry and Physics, Louisiana State University, Shreveport, Louisiana, 71115, United States
| | - Prasenjit Kar
- Department of Chemistry, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India
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14
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Huang Y, Zhao L, Li J, Lu F, Wang S. Effects of methylamine doping on the stability of triple cation (FA 0.95-x MA x Cs 0.05)PbI 3 single crystal perovskites. NANOSCALE ADVANCES 2020; 2:332-339. [PMID: 36133997 PMCID: PMC9417697 DOI: 10.1039/c9na00682f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 11/13/2019] [Indexed: 06/16/2023]
Abstract
Despite being promising photovoltaic materials, widespread use of organic-inorganic halide perovskite materials is still hindered by their undesirable stability. To cope with this challenge, methylamine (MA) is doped into triple cation perovskite single crystals of (FA0.95-x MA x Cs0.05)PbI3, and cesium-containing triple cation perovskite single crystals with five different MA molar ratios (x = 0, 0.05, 0.10, 0.15, and 0.20) are synthesized and characterized. Among them, (FA0.8MA0.15Cs0.05)PbI3 shows high stability against water-oxygen and light for 60 days, and the thermal decomposition temperature of (FA0.8MA0.15Cs0.05)PbI3 reaches as high as 305 °C. Besides, the carrier lifetime of (FA0.8MA0.15Cs0.05)PbI3 is up to 5.957 μs, which remains as 5.646 μs (95%) after 60 days of light illumination. This work studies the stability of perovskite single crystals based on (FA0.95-x MA x Cs0.05)PbI3 compositions and provides a reference for the discovery of novel perovskite photovoltaic devices with high efficiency and long-term stability.
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Affiliation(s)
- Yimin Huang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Wuhan 430062 PR China
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University Wuhan 430062 PR China
| | - Li Zhao
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Wuhan 430062 PR China
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University Wuhan 430062 PR China
| | - Jin Li
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Wuhan 430062 PR China
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University Wuhan 430062 PR China
| | - Fang Lu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Wuhan 430062 PR China
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University Wuhan 430062 PR China
| | - Shimin Wang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Wuhan 430062 PR China
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University Wuhan 430062 PR China
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Guo T, Bose R, Zhou X, Gartstein YN, Yang H, Kwon S, Kim MJ, Lutfullin M, Sinatra L, Gereige I, Al-Saggaf A, Bakr OM, Mohammed OF, Malko AV. Delayed Photoluminescence and Modified Blinking Statistics in Alumina-Encapsulated Zero-Dimensional Inorganic Perovskite Nanocrystals. J Phys Chem Lett 2019; 10:6780-6787. [PMID: 31613634 DOI: 10.1021/acs.jpclett.9b02594] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate enhancement of the photoluminescence (PL) properties of individual zero-dimensional (0D) Cs4PbBr6 perovskite nanocrystals (PNCs) upon encapsulation by alumina using an appropriately modified atomic layer deposition method. In addition to the increased PL intensity and improved long-term stability of encapsulated PNCs, our single-particle studies reveal substantial changes in the PL blinking statistics and the persistent appearance of the long-lived, "delayed" PL components. The blinking patterns exhibit a modification from the fast switching between fluorescent ON and OFF states found in bare PNCs to a behavior with longer ON states and more isolated OFF states in alumina-encapsulated PNCs. Controlled exposure of 0D nanocrystals to moisture suggests that the observed PL lifetime changes may be related to water-induced "reservoir" states that allow for longer-lived charge storage with subsequent back-feeding into the emissive states. Viable encapsulation of PNCs with metal oxides that can preserve and even enhance their PL properties can be utilized in the fabrication of extended structures on their basis for optoelectronic and photonic applications.
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Affiliation(s)
| | | | | | | | - Haoze Yang
- Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Kingdom of Saudi Arabia
| | | | | | - Marat Lutfullin
- Quantum Solutions LLC , Thuwal 23955-6900 , Kingdom of Saudi Arabia
| | - Lutfan Sinatra
- Quantum Solutions LLC , Thuwal 23955-6900 , Kingdom of Saudi Arabia
| | - Issam Gereige
- Saudi Aramco Research & Development Center , Dhahran 31311 , Kingdom of Saudi Arabia
| | - Ahmed Al-Saggaf
- Saudi Aramco Research & Development Center , Dhahran 31311 , Kingdom of Saudi Arabia
| | - Osman M Bakr
- Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Kingdom of Saudi Arabia
| | - Omar F Mohammed
- Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Kingdom of Saudi Arabia
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