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Zhang J, Ding Z, Liu X, He Z, Chen Y, Cai S, Wang J, Li G, Liu Y. Stable, Scalable, and Free-Standing Perovskite Quantum Dots Composite Reinforced by Cellulose Fibers. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36811-36820. [PMID: 38961726 DOI: 10.1021/acsami.4c06762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Perovskite quantum dots (PQDs) have attracted emerging attention as fluorescent and light-absorbing materials for next-generation optoelectronics due to their outstanding properties and cost-efficiency. However, PQD thin film suffers significant instability due to structure and material failures, which hinders their application in flexible and reliable PQD-based advanced wearable devices. Herein, we use commercial cellulose fiber-based filter paper as a substrate to synthesize PQDs in situ and fabricate PQD-paper free-standing flexible composite film. The abundant hydroxy capping ligands of cellulose fibers and the unique dense network structure of the filter paper can facilitate confined crystallization, forming strong interactions between the PQDs and substrate, the unpackaged PQD composite film showed extraordinary stability (>30 days) in the air with high humidity (90%). Meanwhile, the strong interaction between PQDs and paper enables an ultrasimple drop-cast synthesis process with excellent process tolerance, making it customizable and easy to scale up (10 cm in diameter). Due to the uniformly dispersed PQDs on cellulose fibers of the substrate, the composite demonstrates impressive photo-responsive properties. Photodetector (PD) arrays were designed on free-standing PQD paper and flexible graphitic electrodes, and circuits were fabricated by drawing. The PD arrays can work as optical and electrical dual-mode image sensors with incredible bending robustness, enduring up to 100,000 cycles at 180°.
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Affiliation(s)
- Jianfeng Zhang
- School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
| | - Ziyi Ding
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Xinhui Liu
- School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhenhui He
- School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
| | - Yili Chen
- School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
| | - Shuting Cai
- School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
| | - Jinshan Wang
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Guijun Li
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yuan Liu
- School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
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2
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Jiang N, Chu H, Pan Z, Pan H, Zhao S, Li D. One-Step Fabrication of 0D Cs 4PbBr 6 Perovskite with Nonlinear Optical Properties for Ultrafast Pulse Generation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2404465. [PMID: 38995100 DOI: 10.1002/advs.202404465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 06/14/2024] [Indexed: 07/13/2024]
Abstract
Low-dimensional lead halide perovskites demonstrate remarkable nonlinear optical characteristics attributed to their distinctive physical structures and electronic properties. Nevertheless, the investigation into their nonlinear optical properties remains in its incipient stages. This study addresses this gap by precisely controlling solvent volumes to synthesize both 0D Cs4PbBr6 and Cs4PbBr6/CsPbBr3 perovskites. Remarkably, as saturable absorbers, both pure Cs4PbBr6 and Cs4PbBr6/CsPbBr3 composites exhibit favorable nonlinear optical properties within the C-band, showcasing modulation depths of 9.22% and 16.83%, respectively. Moreover, for the first time, Cs4PbBr6 and Cs4PbBr6/CsPbBr3 composites have been successfully integrated into erbium-doped fiber lasers to realize the mode-locking operations. The utilization of the Cs4PbBr6/CsPbBr3 composites as a saturable absorber that enables the generation of conventional soliton mode-locked laser pulses with a pulse duration of 688 fs, and a repetition frequency of 10.947 MHz at a central wavelength of 1557 nm. Cs4PbBr6 is instrumental in generating laser pulses at a frequency of 10.899 MHz, producing pulse widths of 642 fs at the central wavelength of 1531.2 nm and 1.02 ps at the central wavelength of 1565.3 nm, respectively. The findings of this investigation underscore the potential utility of 0D Cs4PbBr6 and Cs4PbBr6/CsPbBr3 composites as promising materials for optical modulation within fiber laser applications.
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Affiliation(s)
- Ning Jiang
- School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao, 266237, China
| | - Hongwei Chu
- School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao, 266237, China
| | - Zhongben Pan
- School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao, 266237, China
| | - Han Pan
- School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao, 266237, China
| | - Shengzhi Zhao
- School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao, 266237, China
| | - Dechun Li
- School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao, 266237, China
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3
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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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4
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Zhou L, Liang L, Chen J, Zhou X, Liu L, Xi S, Loh KP, Han Y, He Q, Liu X. Promoted Growth and Multiband Emission in Heterostructured Perovskites Through Cs + -Sublattice Interaction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306398. [PMID: 38018323 PMCID: PMC10797418 DOI: 10.1002/advs.202306398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/27/2023] [Indexed: 11/30/2023]
Abstract
Precise control of exciton confinement in metal halide perovskites is critical to the development of high-performance, stable optoelectronic devices. A significant hurdle is the swift completion of ionic metathesis reactions, often within seconds, making consistent control challenging. Herein, the introduction of different steric hindrances in a Cs+ sublattice within CsYb2 F7 is reported, which effectively modulates the reaction rate of Cs+ with lead (Pb2+ ) and halide ions in solution, extending the synthesis time for perovskite nanostructures to tens of minutes. Importantly, the Cs+ sublattice provides a crystal facet-dependent preference for perovskite growth and thus exciton confinement, allowing the simultaneous occurrence of up to six emission bands of CsPbBr3 . Moreover, the rigid CsYb2 F7 nano template offers high activation energy and enhances the stability of the resulting perovskite nanostructures. This methodology provides a versatile approach to synthesizing functional heterostructures. Its robustness is demonstrated by in-situ growth of perovskite nanostructures on Cs+ -mediated metal-organic frameworks.
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Affiliation(s)
- Lei Zhou
- Department of ChemistryNational University of SingaporeSingapore117549Singapore
- School of Chemical Engineering and TechnologySun Yat‐sen UniversityZhuhai519802P. R. China
| | - Liangliang Liang
- Department of ChemistryNational University of SingaporeSingapore117549Singapore
| | - Jiaye Chen
- Department of ChemistryNational University of SingaporeSingapore117549Singapore
| | - Xin Zhou
- Materials Science and EngineeringNational University of SingaporeSingapore117575Singapore
| | - Lingmei Liu
- Multi‐scale Porous Materials CenterInstitute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering Chongqing UniversityChongqing400044P. R. China
| | - Shibo Xi
- Institute of Sustainability for ChemicalsEnergy and Environment (ISCE2)Agency for Science, Technology and Research (A*STAR)1 Pesek Road Jurong IslandSingapore627833Singapore
| | - Kian Ping Loh
- Department of ChemistryNational University of SingaporeSingapore117549Singapore
| | - Yu Han
- Physical Sciences and Engineering DivisionAdvanced Membranes and Porous Materials (AMPM) CenterKing Abdullah University of Science and Technology (KAUST)Thuwal23955–6900Saudi Arabia
| | - Qian He
- Materials Science and EngineeringNational University of SingaporeSingapore117575Singapore
| | - Xiaogang Liu
- Department of ChemistryNational University of SingaporeSingapore117549Singapore
- Institute of Materials Research and EngineeringAgency for Science, Technology and ResearchSingapore138634Singapore
- The N1 Institute for HealthNational University of SingaporeSingapore117456Singapore
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5
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Zhang B, Chen C, Chen X. High-Efficiency CsPbBr 3 Light-Emitting Diodes using One-Step Spin-Coating In Situ Dynamic Thermal Crystallization. MICROMACHINES 2023; 14:1104. [PMID: 37374689 DOI: 10.3390/mi14061104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023]
Abstract
All-inorganic perovskite materials (such as CsPbBr3) have received widespread attention because of their better stability than hybrid counterparts, but their poor film morphology and crystalline quality limit their application in perovskite light-emitting devices (PeLEDs). Some previous studies have attempted to improve the morphology and crystalline quality of perovskite films by heating the substrate, but there are still some problems such as inaccurate temperature control, excessive temperature is not conducive to flexible applications, and the mechanism of action is not clear. In this work, we used a one-step spin-coating, low-temperature in situ thermally assisted crystallization process, in which the temperature was accurately monitored using a thermocouple in the range of 23-80 °C, and explored the effect of the in situ thermally assisted crystallization temperature on the crystallization of the all-inorganic perovskite material CsPbBr3 and the performance of PeLEDs. In addition, we focused on the influence mechanism for the in situ thermally assisted crystallization process on the surface morphology and phase composition of the perovskite films and promote its possible application in inkjet printing and scratch coating methods.
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Affiliation(s)
- Buyue Zhang
- College of Physics, Changchun University of Science and Technology, Changchun 130012, China
| | - Chen Chen
- College of Information Technology, Jilin Normal University, Siping 136000, China
| | - Xinyu Chen
- College of Physics, Changchun University of Science and Technology, Changchun 130012, China
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6
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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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7
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Wu Y, Chen X, Wu W. Multiple Stimuli-Response Polychromatic Carbon Dots for Advanced Information Encryption and Safety. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206709. [PMID: 36642825 DOI: 10.1002/smll.202206709] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Optical information encryption and safety have aroused great attention since they are closely correlated to data protection and information safety. The development of multiple stimuli-response optical materials for constructing large-capacity information encryption and safety is very important for practical applications. Carbon dots (CDs) have many gratifying merits, such as polychromatic emission, diverse luminous categories, and stable physicochemical properties, and are considered as one of the most ideal candidates for information protection. Herein, carbon core, functional groups, solvents, and other crucial factors are reviewed for outputting polychromatic emission of multiple luminous categories. In particular, substrate engineering strategies have been emphasized for their critical role in yielding excellent optical features of multiple luminous categories. High-capacity information encryption and safety strategies are reviewed by relying on the rich optical properties of CDs, such as polychromatic emission, multiple luminous categories of fluorescence, afterglow, and upconversion, as well as external-stimuli-assisted optical changes. Some perspectives for preparing excellent CDs and further developing information security strategies are proposed. This review provides a good reference for the manipulation of polychromatic CDs and the development of next-generation information encryption and safety.
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Affiliation(s)
- Youfusheng Wu
- Laboratory of Printable Functional Materials and Printed Electronics, Research Center for Graphic Communication, Printing and Packaging, Wuhan University, Wuhan, 430072, P. R. China
| | - Xiao Chen
- Laboratory of Printable Functional Materials and Printed Electronics, Research Center for Graphic Communication, Printing and Packaging, Wuhan University, Wuhan, 430072, P. R. China
| | - Wei Wu
- Laboratory of Printable Functional Materials and Printed Electronics, Research Center for Graphic Communication, Printing and Packaging, Wuhan University, Wuhan, 430072, P. R. China
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8
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Suresh S, Subramaniam MR, Hazra S, Pal BN, Batabyal SK. Solvent Evaporation Induced Large-Scale Synthesis of Cs 4PbBr 6 and CsPbBr 3 Microcrystals: Optical Properties and Backlight Application for LEDs. ACS OMEGA 2023; 8:4616-4626. [PMID: 36777580 PMCID: PMC9909814 DOI: 10.1021/acsomega.2c05862] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 12/27/2022] [Indexed: 06/18/2023]
Abstract
The contemporary work focuses on embossing the emissive nature of lead halide perovskite materials, specifically Cs4PbBr6 microcrystal powder prepared via single step bulk recrystallization method followed by the solvent evaporation route from gram to kilogram scale. The X-ray diffraction pattern confirms the formation of phase pure Cs4PbBr6 with a goodness of fit value of 1.51 calculated from Rietveld refinement and the fluorophore powder manifesting an intrinsic band gap of 3.76 eV. The experimental yield of 99.4% indicates the absence of any unreacted precursors. The fabricated flexible, free-standing Cs4PbBr6@PMMA film encompassed better moisture stability without undergoing phase transitions for 400 days. The temperature-dependent photoluminescence spectra denote that 51% of the intensity was retained when cooled back to room temperature after heating it till 180 °C. Moisture studies at two extreme humidity conditions also reveal the appreciable stability of the fluorophore film against moisture. The stability studies with respect to UV irradiation substantiate that the film retained its stability even after exposing it continuously to UV radiation for seven days. The outstanding optical properties of these microcrystals, owing to the higher exciton binding energy, make them a promising candidate as excellent fluorophores for color conversion, backlight, and light-emitting applications. The Cs4PbBr6@PMMA film was employed as the top cover of a commercial blue LED, producing a robust green emission which revealed its possible application as a phosphor material.
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Affiliation(s)
- Swapnika Suresh
- Department
of Sciences, Amrita School of Physical Sciences, Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore641112, Tamil Nadu, India
| | - Mohan Raj Subramaniam
- Department
of Sciences, Amrita School of Physical Sciences, Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore641112, Tamil Nadu, India
| | - Sobhan Hazra
- School
of Material Science and Technology, Indian
Institute of Technology (BHU), Varanasi221005, Uttar
Pradesh, India
| | - Bhola Nath Pal
- School
of Material Science and Technology, Indian
Institute of Technology (BHU), Varanasi221005, Uttar
Pradesh, India
| | - Sudip K. Batabyal
- Department
of Sciences, Amrita School of Physical Sciences, Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore641112, Tamil Nadu, India
- Amrita
Center for Industrial Research & Innovation (ACIRI), Amrita School
of Engineering, Coimbatore, Amrita Vishwa
Vidyapeetham, Coimbatore641112, Tamil Nadu, India
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Rao L, Sun B, Liu Y, Zhong G, Wen M, Zhang J, Fu T, Wang S, Wang F, Niu X. Highly Stable and Photoluminescent CsPbBr 3/Cs 4PbBr 6 Composites for White-Light-Emitting Diodes and Visible Light Communication. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:355. [PMID: 36678108 PMCID: PMC9861840 DOI: 10.3390/nano13020355] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/29/2022] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
Inorganic lead halide perovskite is one of the most excellent fluorescent materials, and it plays an essential role in high-definition display and visible light communication (VLC). Its photochromic properties and stability determine the final performance of light-emitting devices. However, efficiently synthesizing perovskite with high quality and stability remains a significant challenge. Here, we develop a facile and environmentally friendly method for preparing high-stability and strong-emission CsPbBr3/Cs4PbBr6 composites using ultrasonication and liquid paraffin. Tuning the contents of liquid paraffin, bright-emission CsPbBr3/Cs4PbBr6 composite powders with a maximum PLQY of 74% were achieved. Thanks to the protection of the Cs4PbBr6 matrix and liquid paraffin, the photostability, thermostability, and polar solvent stability of CsPbBr3/Cs4PbBr6-LP are significantly improved compared to CsPbBr3 quantum dots and CsPbBr3/Cs4PbBr6 composites that were prepared without liquid paraffin. Moreover, the fabricated CsPbBr3/Cs4PbBr6-LP-based WLEDs show excellent luminescent performance with a power efficiency of 129.5 lm/W and a wide color gamut, with 121% of the NTSC and 94% of the Rec. 2020, demonstrating a promising candidate for displays. In addition, the CsPbBr3/Cs4PbBr6-LP-based WLEDs were also demonstrated in a VLC system. The results suggested the great potential of these high-performance WLEDs as an excitation light source to achieve VLC.
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Affiliation(s)
- Longshi Rao
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Bin Sun
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Yang Liu
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Guisheng Zhong
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Mingfu Wen
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Jiayang Zhang
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Ting Fu
- Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Shuangxi Wang
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Fengtao Wang
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
| | - Xiaodong Niu
- Department of Mechanical Engineering, College of Engineering, Shantou University, Shantou 515063, China
- Intelligent Manufacturing Key Laboratory of Ministry of Education, Shantou University, Shantou 515063, China
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10
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Rao L, Sun B, Zhang Q, Wen M, Zhang J, Zhong G, Fu T, Niu X, Tang Y. Highly emissive green CsPbBr 3/Cs 4PbBr 6 composites: formation kinetics, excellent heat, light, and polar solvent resistance, and flexible light-emitting application. OPTICS EXPRESS 2022; 30:45376-45392. [PMID: 36522944 DOI: 10.1364/oe.474545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
Benefit from their near-unity photoluminescence quantum yield (PL QY), narrow emission band, and widely tunable bandgap, metal halide perovskites have shown promising in light-emitting applications. Despite such promise, how to facile, environmentally-friendly, and large-scale prepare solid metal halide perovskite with high emission and stability remains a challenging. Herein, we demonstrate a convenient and environmentally-friendly method for the mass synthesis of solid CsPbBr3/Cs4PbBr6 composites using high-power ultrasonication. Adjusting key experimental parameters, bright emitting CsPbBr3/Cs4PbBr6 solids with a maximum PL QY of 71% were obtained within 30 min. XRD, SEM, TEM, Abs/PL, XPS, and lifetime characterizations provide solid evidence for forming CsPbBr3/Cs4PbBr6 composites. Taking advantage of these composites, the photostability, thermostability, and polar solvent stability of CsPbBr3/Cs4PbBr6 are much improved compared to CsPbBr3. We further demonstrated CsPbBr3/Cs4PbBr6 use in flexible/stretchable film and high-power WLEDs. After being subjected to bending, folding, and twisting, the film retains its bright emission and exhibits good resistance to mechanical deformation. Additionally, our WLEDs display a superior, durable high-power-driving capability, operating currents up to 300 mA and maintaining high luminous intensity for 50 hours. Such highly emissive and stable metal halide perovskites make them promising for solid-state lighting, lasing, and flexible/stretchable display device applications.
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11
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Baek KY, Lee W, Lee J, Kim J, Ahn H, Kim JI, Kim J, Lim H, Shin J, Ko YJ, Lee HD, Friend RH, Lee TW, Lee J, Kang K, Lee T. Mechanochemistry-driven engineering of 0D/3D heterostructure for designing highly luminescent Cs–Pb–Br perovskites. Nat Commun 2022; 13:4263. [PMID: 35871221 PMCID: PMC9308791 DOI: 10.1038/s41467-022-31924-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 07/06/2022] [Indexed: 11/16/2022] Open
Abstract
Embedding metal-halide perovskite particles within an insulating host matrix has proven to be an effective strategy for revealing the outstanding luminescence properties of perovskites as an emerging class of light emitters. Particularly, unexpected bright green emission observed in a nominally pure zero-dimensional cesium–lead–bromide perovskite (Cs4PbBr6) has triggered intensive research in better understanding the serendipitous incorporation of emissive guest species within the Cs4PbBr6 host. However, a limited controllability over such heterostructural configurations in conventional solution-based synthesis methods has limited the degree of freedom in designing synthesis routes for accessing different structural and compositional configurations of these host–guest species. In this study, we provide means of enhancing the luminescence properties in the nominal Cs4PbBr6 powder through a guided heterostructural configuration engineering enabled by solid-state mechanochemical synthesis. Realized by an in-depth study on time-dependent evaluation of optical and structural properties during the synthesis of Cs4PbBr6, our target-designed synthesis protocol to promote the endotaxial formation of Cs4PbBr6/CsPbBr3 heterostructures provides key insights for understanding and designing kinetics-guided syntheses of highly luminescent perovskite emitters for light-emitting applications. While emission and stability of metal–halide perovskites can be enhanced through heterostructural encapsulation, a controlled synthesis route to such structures is not trivial to realize. Here, the authors design a mechanochemistry-driven protocol for synthesizing highly luminescent CsPbBr3/Cs4PbBr6 heterostructures.
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12
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Lu D, Urayama A, Saito N. Enhanced luminescence and dispersion stability of lead halide perovskite nanocrystals by surface modification via O/W emulsion. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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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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14
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Singh RK, Chen LH, Singh A, Jain N, Singh J, Lu CH. Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.863312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The technology behind the display is becoming ever more prevalent in our daily lives. It has many applications, including smartphones, tablets, desktop monitors, TVs, and augmented reality/virtual reality devices. The display technology has progressed drastically over the past decade, from the bulky cathode ray tube to the flat panel displays. In the flat panel displays, the liquid crystal display (LCD) and organic light-emitting diodes (OLEDs) are the two dominant technologies. Nevertheless, due to low stability and color tunability, OLEDs remain behind the LCDs. The LCD screen has a backlight, usually a white LED, which comprises a blue LED covered with a red and green enhanced layer (color-converting layers). Although InP/CdSe QDs attracted more attention due to their solution processability and better color gamut than the previous technologies, the complexity of their synthesis was still an obstacle to their commercialization. Later, the emergence of perovskite with highly intense and tunable PL emission, high color purity, and low-cost synthesis route attracted the attention of display researchers. Owing to the relatively higher performance of perovskite quantum dots (PQDs) than that of bulk (3D) perovskite in backlit display devices, these PQDs are being used for high color contrast and bright display devices. Furthermore, the color gamut for PQDs was observed as 140% of the NTSC standard, that is, close to that of the commercial OLED devices. In this review, we have discussed the progress of display technologies with a clear classification of the pros and cons of each technology. Also, the application of perovskite QD/nanomaterials in LCD backlit devices has been discussed, and the future direction of further improvement in their stability and performance has been listed.
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15
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Kim H, Park JH, Kim K, Lee D, Song MH, Park J. Highly Emissive Blue Quantum Dots with Superior Thermal Stability via In Situ Surface Reconstruction of Mixed CsPbBr 3 -Cs 4 PbBr 6 Nanocrystals. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104660. [PMID: 34957694 PMCID: PMC8844471 DOI: 10.1002/advs.202104660] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Indexed: 06/07/2023]
Abstract
Although metal halide perovskites are candidate high-performance light-emitting diode (LED) materials, blue perovskite LEDs are problematic: mixed-halide materials are susceptible to phase segregation and bromide-based perovskite quantum dots (QDs) have low stability. Herein, a novel strategy for highly efficient, stable cesium lead bromide (CsPbBr3 ) QDs via in situ surface reconstruction of CsPbBr3 -Cs4 PbBr6 nanocrystals (NCs) is reported. By controlling precursor reactivity, the ratio of CsPbBr3 to Cs4 PbBr6 NCs is successfully modulated. A high photoluminescence quantum yield (PLQY) of >90% at 470 nm is obtained because octahedron CsPbBr3 QD surface defects are removed by the Cs4 PbBr6 NCs. The defect-engineered QDs exhibit high colloidal stability, retaining >90% of their initial PLQY after >120 days of ambient storage. Furthermore, thermal stability is demonstrated by a lack of heat-induced aggregation at 120 °C. Blue LEDs fabricated from CsPbBr3 QDs with reconstructed surfaces exhibit a maximum external quantum efficiency of 4.65% at 480 nm and excellent spectral stability.
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Affiliation(s)
- Hyeonjung Kim
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Jong Hyun Park
- Department of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Kangyong Kim
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Dongryeol Lee
- Department of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Myoung Hoon Song
- Department of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Jongnam Park
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
- Department of Biomedical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
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16
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Zhang X, Zhou B, Chen X, Yu WW. Reversible Transformation between Cs 3Cu 2I 5 and CsCu 2I 3 Perovskite Derivatives and Its Anticounterfeiting Application. Inorg Chem 2021; 61:399-405. [PMID: 34928576 DOI: 10.1021/acs.inorgchem.1c03021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Lead halide perovskites have promising values in photoelectronic and photovoltaic applications, but the toxicity of lead is a hard barrier. Copper halide perovskite derivatives (CHPDs), as a lead-free substitution of lead halide perovskites, also exhibit excellent photoelectric properties. Here, we present a facile one-step route for the synthesis of blue-emissive Cs3Cu2I5 (emission at 440 nm) and yellow-emissive CsCu2I3 (emission at 552 nm) CHPDs in ethanol at room temperature. Triggered by ethanol or CsI, a reversible chemical transformation accompanied by emissive color change between Cs3Cu2I5 and CsCu2I3 CHPDs was achieved. The reversible transformation mechanism was discussed, and this transformation was employed for effective anticounterfeiting.
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Affiliation(s)
- Xiangtong Zhang
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-Efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475000, China
| | - Biao Zhou
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-Efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475000, China
| | - Xueping Chen
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-Efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475000, China
| | - William W Yu
- Department of Chemistry and Physics, Louisiana State University, Shreveport, Louisiana 71115, United States
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17
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Photoluminescent ionic metal halides based on s2 typed ions and aprotic ionic liquid cations. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214185] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Ding H, Shan Y, Wang J, Xu Q, Han J, Jiao M, Cao K, Liu M, Mu H, Zhang S, Yang C. Revealing photoluminescence mechanisms of single CsPbBr 3/Cs 4PbBr 6 core/shell perovskite nanocrystals. RSC Adv 2021; 11:30465-30471. [PMID: 35480288 PMCID: PMC9041139 DOI: 10.1039/d1ra04981j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 08/12/2021] [Indexed: 11/21/2022] Open
Abstract
CsPbBr3 nanocrystals (NCs) encapsulated by Cs4PbBr6 has attracted extensive attention due to good stability and high photoluminescence (PL) emission efficiency. However, the origin of photoluminescence (PL) emission from CsPbBr3/Cs4PbBr6 composite materials has been controversial. In this work, we prepare CsPbBr3/Cs4PbBr6 core/shell nanoparticles and firstly study the mechanism of its photoluminescence (PL) at the single-particle level. Based on photoluminescence (PL) intensity trajectories and photon antibunching measurements, we have found that photoluminescence (PL) intensity trajectories of individual CsPbBr3/Cs4PbBr6 core/shell NCs vary from the uniform longer periods to multiple-step intensity behaviors with increasing excitation level. Meanwhile, second-order photon correlation functions exhibit single photon emission behaviors especially at lower excitation levels. However, the PL intensity trajectories of individual Cs4PbBr6 NCs demonstrate apparent "burst-like" behaviors with very high values of g 2(0) at any excitation power. Therefore, the distinguishable emission statistics help us to elucidate whether the photoluminescence (PL) emission of CsPbBr3/Cs4PbBr6 core/shell NCs stems from band-edge exciton recombination of CsPbBr3 NCs or intrinsic Br vacancy states of Cs4PbBr6 NCs. These findings provide key information about the origin of emission in CsPbBr3/Cs4PbBr6 core/shell nanoparticles, which improves their utilization in the further optoelectronic applications.
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Affiliation(s)
- Huafeng Ding
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Yansu Shan
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Jizhou Wang
- Lanzhou Institute of Space Technology and Physics Lanzhou 730000 People's Republic of China
| | - Qinfeng Xu
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Jing Han
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Mengmeng Jiao
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Kunjian Cao
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Mingliang Liu
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Haifeng Mu
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Shufang Zhang
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
| | - Chuanlu Yang
- Department of Physics and Optoelectronic Engineering, Ludong University Yantai 264025 People's Republic of China
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19
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Ding Y, Lin R, Liang Y, Zheng W, Chen L, Ouyang X, Ouyang X, Huang F. High-Efficiency Down-Conversion Radiation Fluorescence and Ultrafast Photoluminescence (1.2 ns) at the Interface of Hybrid Cs 4PbBr 6-CsI Nanocrystals. J Phys Chem Lett 2021; 12:7342-7349. [PMID: 34323502 DOI: 10.1021/acs.jpclett.1c01615] [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
The research of fast scintillators in positron emission tomography and other applications based on time-of-flight technology promotes the development of radiation detection. However, because of the current lack of efficient and fast carrier radiation recombination pathways, the research on scintillator radioluminescence (RL) still faces severe challenges. Here, we propose an effective interface carrier transport mechanism: CsI:Na crystal and Cs4PbBr6 nanocrystals (NCs) interface to form a new phase and a continuous heterostructure, providing an effective channel for X-ray excited carrier transfer to Cs4PbBr6. Then, the excited carriers realize efficient recombination luminescence through the self-trapped excitons inside Cs4PbBr6. On the basis of this mechanism, the heterostructure composite scintillator composed of CsI:Na/Cs4PbBr6 exhibits high-efficiency radiant fluorescence and an ultrafast photoluminescence (PL) decay time of 1.22 ns. The effective interface carrier transport shown in this work provides an optimization idea that can be used for reference in the research of fast scintillators.
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Affiliation(s)
- Ying Ding
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Richeng Lin
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Yali Liang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Wei Zheng
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Liang Chen
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, Shanxi 710024, China
| | - Xiao Ouyang
- Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
| | - Xiaoping Ouyang
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, Shanxi 710024, China
| | - Feng Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-sen University, Guangzhou 510275, China
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20
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Duan Y, Li P, Lu Y, Wang X, Xu S, Zhang J. Erasable Cs 4PbBr 6 quantum dots glass with switchable photoluminescence. OPTICS LETTERS 2021; 46:3580-3583. [PMID: 34329229 DOI: 10.1364/ol.432732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Encapsulating quantum dots (QDs) into a transparent glass matrix can not only increase their stability but also explore new luminescence properties. Herein, erasable Cs4PbBr6 QDs with switchable photoluminescence are successfully obtained by a heat-treatment method in a borosilicate glass matrix. First, QDs can self-crystalize in borosilicate glass without the heat treatment. Second, it is found that when the QDs glass is heat treated below Tg, QDs can be destroyed. Further, when the QDs glass is reheat treated above Tg, atom rearrangement can occur and QDs can reprecipitate in the glass matrix. Consequently, the switchable photoluminescence of QDs can be achieved. The special erasable QDs glass and switchable photoluminescence in this work can resolve the technological challenge of recovering the luminescence performance of QDs after they have been destroyed.
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21
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Bao Z, Hsiu CY, Fang MH, Majewska N, Sun W, Huang SJ, Yuan ECY, Chang YC, Chan JCC, Mahlik S, Zhou W, Yang CW, Lu KM, Liu RS. Formation and Near-Infrared Emission of CsPbI 3 Nanoparticles Embedded in Cs 4PbI 6 Crystals. ACS APPLIED MATERIALS & INTERFACES 2021; 13:34742-34751. [PMID: 34264640 DOI: 10.1021/acsami.1c08920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Cs4PbI6, as a rarely investigated member of the Cs4PbX6 (X is a halogen element) family, has been successfully synthesized at low temperatures, and the synthetic conditions have been optimized. Metal iodides such as LiI, KI, NiI2, CoI2, and ZnI2, as additives, play an important role in enhancing the formation of the Cs4PbI6 microcrystals. ZnI2 with the lowest dissociation energy is the most efficient additive to supply iodide ions, and its amount of addition has also been optimized. Strong red to near-infrared (NIR) emission properties have been detected, and its optical emission centers have been identified to be numerous embedded perovskite-type α-CsPbI3 nanocrystallites (∼5 nm in diameter) based on investigations of temperature- and pressure-dependent photoluminescent properties. High-resolution transmission electron microscopy was used to detect these hidden nanoparticles, although the material was highly beam-sensitive and confirmed a "raisin bread"-like structure of the Cs4PbI6 crystals. A NIR mini-LED for the biological application has been successfully fabricated using as-synthesized Cs4PbI6 crystals. This work provides information for the future development of infrared fluorescent nanoscale perovskite materials.
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Affiliation(s)
- Zhen Bao
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Chiao-Yin Hsiu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Mu-Huai Fang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Natalia Majewska
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Gdańsk 80-308, Poland
| | - Weihao Sun
- School of Chemistry, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Shing-Jong Huang
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan
| | | | - Yu-Chun Chang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | | | - Sebastian Mahlik
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Gdańsk 80-308, Poland
| | - Wuzong Zhou
- School of Chemistry, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Chia-Wei Yang
- Everlight Electronics Co., Ltd., New Taipei City 238, Taiwan
| | - Kuang-Mao Lu
- Everlight Electronics Co., Ltd., New Taipei City 238, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Advanced Research Center of Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
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22
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Děcká K, Suchá A, Král J, Jakubec I, Nikl M, Jarý V, Babin V, Mihóková E, Čuba V. On the Role of Cs 4PbBr 6 Phase in the Luminescence Performance of Bright CsPbBr 3 Nanocrystals. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1935. [PMID: 34443766 PMCID: PMC8400622 DOI: 10.3390/nano11081935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022]
Abstract
CsPbBr3 nanocrystals have been identified as a highly promising material for various optoelectronic applications. However, they tend to coexist with Cs4PbBr6 phase when the reaction conditions are not controlled carefully. It is therefore imperative to understand how the presence of this phase affects the luminescence performance of CsPbBr3 nanocrystals. We synthesized a mixed CsPbBr3-Cs4PbBr6 sample, and compared its photo- and radioluminescence properties, including timing characteristics, to the performance of pure CsPbBr3 nanocrystals. The possibility of energy transfer between the two phases was also explored. We demonstrated that the presence of Cs4PbBr6 causes significant drop in radioluminescence intensity of CsPbBr3 nanocrystals, which can limit possible future applications of Cs4PbBr6-CsPbBr3 mixtures or composites as scintillation detectors.
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Affiliation(s)
- Kateřina Děcká
- Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic; (A.S.); (J.K.); (V.Č.)
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic; (M.N.); (V.J.); (V.B.); (E.M.)
| | - Adéla Suchá
- Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic; (A.S.); (J.K.); (V.Č.)
| | - Jan Král
- Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic; (A.S.); (J.K.); (V.Č.)
| | - Ivo Jakubec
- Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež č.p. 1001, 250 68 Řež, Czech Republic;
| | - Martin Nikl
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic; (M.N.); (V.J.); (V.B.); (E.M.)
| | - Vítězslav Jarý
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic; (M.N.); (V.J.); (V.B.); (E.M.)
| | - Vladimir Babin
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic; (M.N.); (V.J.); (V.B.); (E.M.)
| | - Eva Mihóková
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic; (M.N.); (V.J.); (V.B.); (E.M.)
| | - Václav Čuba
- Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic; (A.S.); (J.K.); (V.Č.)
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23
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Shang Z, Xue W, Wang W, Li Y. Highly Stable CsPbBr3 Nanocrystal Phosphors by Surface Passivation and Encapsulation. Chem Res Chin Univ 2021. [DOI: 10.1007/s40242-021-1153-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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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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25
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Bao Z, Chiu HD, Wang W, Su Q, Yamada T, Chang YC, Chen S, Kanemitsu Y, Chung RJ, Liu RS. Highly Luminescent CsPbBr 3@Cs 4PbBr 6 Nanocrystals and Their Application in Electroluminescent Emitters. J Phys Chem Lett 2020; 11:10196-10202. [PMID: 33205976 DOI: 10.1021/acs.jpclett.0c03142] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Zero-dimensional perovskite nanocrystals (NCs) are becoming the most attractive material due to their excellent optical performance and better stability compared with high-dimensional perovskite. However, their application in electroluminescent (EL) emitters for high-quality displays is still limited. In this work, we successfully achieved CsPbBr3@Cs4PbBr6 NCs around 13.9 ± 0.2 nm by using the hot-injection method. Additional SnBr2 was mixed in the PbBr2 precursor to provide extra Br- ions and reduce the excessive amount of Pb2+ ions to promote the formation of CsPbBr3@Cs4PbBr6. Time resolution photoluminescence analysis indicated that the green emission of our CsPbBr3@Cs4PbBr6 NCs originated from the embedded CsPbBr3 NCs, which corresponds to our previous research. The Cs4PbBr6 crystals passivated the surface of CsPbBr3 NCs, resulting in the absence of trions for the high photoluminescence quantum yield. The as-synthesized CsPbBr3@Cs4PbBr6 NCs were used to fabricate quantum dot light-emitting diode (QLED) devices with the highest current efficiency of 4.89 cd/A. This is the best performance of the CsPbBr3@Cs4PbBr6-system QLED device, which reveals the great potential of CsPbBr3@Cs4PbBr6 NCs and will inspire further study of zero-dimensional perovskite composite NCs for EL emitters.
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Affiliation(s)
- Zhen Bao
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Hsin-Di Chiu
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Weigao Wang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qiang Su
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Takumi Yamada
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yu-Chun Chang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shuming Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yoshihiko Kanemitsu
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Advanced Research Center of Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
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26
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Xiong X, Liu H, Wang W, Gong J, Chen X, Zhao Y, Tian T, Wang L. Fluorescence-enhanced Cs 4 PbBr 6 /CsPbBr 3 composites films synthesized by double-films solid phase reaction method. LUMINESCENCE 2020; 36:631-641. [PMID: 33171538 DOI: 10.1002/bio.3981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 11/02/2020] [Accepted: 11/04/2020] [Indexed: 11/06/2022]
Abstract
Due to indispensable ligands, polluted organic solution, or complex vapour deposition, stable CsPbBr3 film is hard to be prepared directly using a simple and environmentally friendly method. To improve the stability of CsPbBr3 film and its synthesis methods, the double-films solid phase reaction was developed, and Cs4 PbBr6 /CsPbBr3 composites were designed. Although the synthesized particle had a size of 2-5 μm, much larger than that of quantum dots, in ambient conditions the composites films still showed good photoluminescence properties, with the highest photoluminescence quantum yield of 80%. It had good stability against air, temperature and humidity, and even had interesting fluorescence-enhanced phenomenon after about 4 days.
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Affiliation(s)
- Xuhui Xiong
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Hu Liu
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Wei Wang
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Jinhui Gong
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Xiangting Chen
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Yaxuan Zhao
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Tingfang Tian
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
| | - Li Wang
- School of Materials Science and Engineering, Nanchang University, Nanchang, China
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27
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Aharon S, Etgar L. Indication of CsPbBr
3
inclusions in zero dimensional Cs
4
PbBr
6
perovskite single crystals by alkylammonium post‐treatment. NANO SELECT 2020. [DOI: 10.1002/nano.202000119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Sigalit Aharon
- Casali Center for Applied Chemistry The Hebrew University of Jerusalem Institute of Chemistry Jerusalem 91904 Israel
| | - Lioz Etgar
- Casali Center for Applied Chemistry The Hebrew University of Jerusalem Institute of Chemistry Jerusalem 91904 Israel
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28
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Chen K, Wang C, Peng Z, Qi K, Guo Z, Zhang Y, Zhang H. The chemistry of colloidal semiconductor nanocrystals: From metal-chalcogenides to emerging perovskite. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213333] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Lian H, Li Y, Sharafudeen K, Zhao W, Krishnan GR, Zhang S, Qiu J, Huang K, Han G. Highly Thermotolerant Metal Halide Perovskite Solids. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002495. [PMID: 32462669 DOI: 10.1002/adma.202002495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
By virtue of their narrow emission bands, near-unity quantum yield, and low fabrication cost, metal halide perovskites hold great promise in numerous aspects of optoelectronic applications, including solid-state lighting, lasing, and displays. Despite such promise, the poor temperature tolerance and suboptimal quantum yield of the existing metal halide perovskites in their solid state have severely limited their practical applications. Here, a straightforward heterogeneous interfacial method to develop superior thermotolerant and highly emissive solid-state metal halide perovskites is reported and their use as long-lasting high-temperature and high-input-power durable solid-state light-emitting diodes is illustrated. It is found that the resultant materials can well maintain their superior quantum efficiency after heating at a temperature over 150 °C for up to 22 h. A white light-emitting diode (w-LED) constructed from the metal halide perovskite solid exhibits superior temperature sustainable lifetime over 1100 h. The w-LED also displays a highly durable high-power-driving capability, and its working current can go up to 300 mA. It is believed that such highly thermotolerant metal halide perovskites will unleash the possibility of a wide variety of high-power and high-temperature solid-state lighting, lasing, and display devices that have been limited by existing methods.
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Affiliation(s)
- Huiwang Lian
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yang Li
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | | | - Weiren Zhao
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Gopi R Krishnan
- Department of Physics, NSS College Pandalam, Pathanamthitta, Kerala, 689501, India
| | - Shaoan Zhang
- School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou, 510665, China
| | - Jianrong Qiu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Kai Huang
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, USA
| | - Gang Han
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, USA
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30
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Chen C, Han TH, Tan S, Xue J, Zhao Y, Liu Y, Wang H, Hu W, Bao C, Mazzeo M, Wang R, Duan Y, Yang Y. Efficient Flexible Inorganic Perovskite Light-Emitting Diodes Fabricated with CsPbBr 3 Emitters Prepared via Low-Temperature in Situ Dynamic Thermal Crystallization. NANO LETTERS 2020; 20:4673-4680. [PMID: 32437162 DOI: 10.1021/acs.nanolett.0c01550] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The present study systematically investigates the morphology and crystallization process of inorganic CsPbBr3 perovskite layer films fabricated by thermal coevaporation in conjunction with continuous low-temperature thermal annealing to promote in situ dynamic thermal crystallization. The results confirm for the first time that both the crystal grain size and the compactness of the CsPbBr3 films can be tuned during the thermal coevaporation fabrication process via in situ dynamic thermal crystallization. The performance of the PeLEDs employing the CsPbBr3 films as the emitter layer is investigated in detail with respect to the substrate temperature and deposition rate employed during deposition of the CsPbBr3 film. This study provides guidelines for developing suitable film production processes and highlights future challenges that must be addressed to facilitate the commercial development of large-area, uniform, and flexible perovskite-based optoelectronic devices.
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Affiliation(s)
- Chen Chen
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Tae-Hee Han
- Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Republic of Korea
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
| | - Shaun Tan
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
| | - Jingjing Xue
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
| | - Yepin Zhao
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
| | - Yunfei Liu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Haoran Wang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Wei Hu
- School of Physics and Electronics, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Cong Bao
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Marco Mazzeo
- Istituto di Nanotecnologia-CNR-Nanotec, Via Monteroni, 73100 Lecce, Italy
| | - Rui Wang
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
| | - Yu Duan
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
| | - Yang Yang
- Department of Materials Science and Engineering, and California Nano Systems Institute, University of California, Los Angeles, California 90095, United States
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31
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Feng J, Han X, Huang H, Meng Q, Zhu Z, Yu T, Li Z, Zou Z. Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr 3 perovskite films. Sci Bull (Beijing) 2020; 65:726-737. [PMID: 36659106 DOI: 10.1016/j.scib.2020.01.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/04/2020] [Accepted: 01/19/2020] [Indexed: 01/21/2023]
Abstract
Inorganic lead halide perovskite CsPbBr3 offers attractive photophysical properties and phase stability for high-performance optoelectronic devices. However, CsPbBr3 films produced by the classic solution-based two-step method are always accompanied with impurity phases of CsPb2Br5 and Cs4PbBr6, which represents a major efficiency-limiting factor for future advances of CsPbBr3-based devices. The challenge lies in the complexity of the Cs-Pb-Br phase system, requiring both spatially and temporally precise control of the precursor stoichiometry during solution-phase growth of CsPbBr3 films. By adopting 2-methoxyethanol as the solution conversion medium instead of commonly applied methanol, the reaction between CsBr and PbBr2 can be finely controlled to yield single phase CsPbBr3 films within a few minutes; extending the solution-conversion step to 24 h does not alter the phase purity of resulting CsPbBr3 films. The present work paves the way to regulate the crystal growth behaviors of two-step solution-processed CsPbBr3 films by simple solvent engineering.
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Affiliation(s)
- Jianyong Feng
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Xiaopeng Han
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| | - Huiting Huang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Qingxiao Meng
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| | - Zhi Zhu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| | - Tao Yu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China.
| | - Zhaosheng Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
| | - Zhigang Zou
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
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32
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McGrath F, Ghopade U, Ryan KM. Synthesis and dimensional control of CsPbBr 3 perovskite nanocrystals using phosphorous based ligands. J Chem Phys 2020; 152:174702. [PMID: 32384846 DOI: 10.1063/1.5128233] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Nanocrystals of the inorganic perovskite, CsPbBr3, display outstanding photo-physical properties, making them ideal for next generation optical devices. However, the typical combination of oleic acid and oleylamine ligands employed in their synthesis is easily displaced, leading to poor stability that can hinder their applicability. In this work, we look toward the replacement of the oleic acid and amine with phosphorous-based ligands. We synthesize CsPbBr3 nanocrystals using an oleylamine/alkylphosphonic acid combination with near perfect monodispersity with the ability to tune the bandgap by varying the alkyl chain length. We further investigate the replacement of the oleylamine giving a ligand combination of alkylphosphonic acid/trioctylphosphine oxide for perovskite nanocrystal nucleation and growth. This combination is typical for the widely studied metal chalcogenide synthesis and in our study with CsPbBr3 yields a pure phase perovskite.
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Affiliation(s)
- Fiona McGrath
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland
| | - Uma Ghopade
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland
| | - Kevin M Ryan
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland
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33
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Zhang BB, Chen JK, Ma JP, Jia XF, Zhao Q, Guo SQ, Chen YM, Liu Q, Kuroiwa Y, Moriyoshi C, Zhang J, Sun HT. Antithermal Quenching of Luminescence in Zero-Dimensional Hybrid Metal Halide Solids. J Phys Chem Lett 2020; 11:2902-2909. [PMID: 32212731 DOI: 10.1021/acs.jpclett.0c00293] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Zero-dimensional (0D) hybrid metal halides have emerged as a new generation of luminescent phosphors owing to their high radiative recombination rates, which, akin to their three-dimensional cousins, commonly demonstrate thermal quenching of luminescence. Here, we report on the finding of antithermal quenching of luminescence in 0D hybrid metal halides. Using (C9NH20)2SnBr4 single crystals as an example system, we show that 0D metal halides can demonstrate antithermal quenching of luminescence. A combination of experimental characterizations and first-principles calculations suggests that antithermal quenching of luminescence is associated with trap states introduced by structural defects in (C9NH20)2SnBr4. Importantly, we find that antithermal quenching of luminescence is not only limited to (C9NH20)2SnBr4 but also exists in other 0D metal halides. Our work highlights the important role of defects in impacting photophysical properties of hybrid metal halides and may stimulate new efforts to explore metal halides exhibiting antithermal quenching of luminescence at higher temperatures.
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Affiliation(s)
- Bin-Bin Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Jia-Kai Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ju-Ping Ma
- Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Fang Jia
- Key Laboratory of Micro-nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 100191, China
| | - Qing Zhao
- Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Shao-Qiang Guo
- Key Laboratory of Micro-nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 100191, China
| | - Ya-Meng Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Qi Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yoshihiro Kuroiwa
- Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Chikako Moriyoshi
- Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Junying Zhang
- Key Laboratory of Micro-nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 100191, China
| | - Hong-Tao Sun
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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34
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Kostopoulou A, Brintakis K, Serpetzoglou E, Stratakis E. Laser-Assisted Fabrication for Metal Halide Perovskite-2D Nanoconjugates: Control on the Nanocrystal Density and Morphology. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E747. [PMID: 32295209 PMCID: PMC7221537 DOI: 10.3390/nano10040747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/02/2020] [Accepted: 04/09/2020] [Indexed: 12/24/2022]
Abstract
We report on a facile and rapid photo-induced process to conjugate graphene-based materials with metal-halide perovskite nanocrystals. We show that a small number of laser pulses is sufficient to decorate the 2-dimensional (2D) flakes with metal-halide nanocrystals without affecting their primary morphology. At the same time, the density of anchored nanocrystals could be finely tuned by the number of irradiation pulses. This facile and rapid room temperature method provides unique opportunities for the design and development of perovskite-2D nanoconjugates, exhibiting synergetic functionality by combining nanocrystals of different morphologies and chemical phases with various 2D materials.
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Affiliation(s)
- Athanasia Kostopoulou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
| | - Konstantinos Brintakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
| | - Efthymis Serpetzoglou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
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35
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Zhao L, Yin C, Long T, Hu P, Yang Z. Light-Driven Halide Exchange Facilitates Complete Crystal Transformation in Nanostructured Perovskites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3064-3071. [PMID: 32142301 DOI: 10.1021/acs.langmuir.0c00278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Colloidal perovskite nanocrystals (NCs) have shown promise in visible and near-infrared light emission compared with conventional quantum dots because of their sharp and highly efficient emission. Light-driven halide exchange offers high degrees of tunability of perovskite NC composition and photoluminescence properties. A remaining challenge is the incomplete change between bromide and chloride due to the presence of radical quenchers. Herein, an optimized in situ halide exchange method of perovskite NCs is reported. Chloroform is used as the solvent and the precursor to effectively generate halide radicals and ions under ultraviolet light irradiation in an inert atmosphere. This strategy achieves complete crystal transformation in colloidal perovskite NCs such as CsPbBr3-to-CsPbCl3 and Cs4PbBr6-to-CsPbCl3. The exchange reaction rate can be further tuned by the presence of B-site dopants such as Zn2+ and Ce3+. The dopant cations are partially remained in the exchanged perovskite NCs, indicating the predominance of thermodynamic control in the crystal transformation.
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Affiliation(s)
- Liang Zhao
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Changzhen Yin
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Ting Long
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Peng Hu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Zhenyu Yang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
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36
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Yuan Y, Yao Q, Zhang J, Wang K, Zhang W, Zhou T, Sun H, Ding J. Negative photoconductivity in Cs4PbBr6 single crystal. Phys Chem Chem Phys 2020; 22:14276-14283. [DOI: 10.1039/d0cp02004d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Negative photoconductivity is firstly observed in large size Cs4PbBr6 single crystal that grown from Cs-rich solution. The Br vacancy and free excitons are responsible for this novel phenomena.
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Affiliation(s)
- Ye Yuan
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Qing Yao
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Jie Zhang
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Kaiyu Wang
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Weiwei Zhang
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | | | - Haiqing Sun
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Jianxu Ding
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
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37
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Dong GX, Zhang W, Mu YF, Su K, Zhang M, Lu TB. A halide perovskite as a catalyst to simultaneously achieve efficient photocatalytic CO2 reduction and methanol oxidation. Chem Commun (Camb) 2020; 56:4664-4667. [DOI: 10.1039/d0cc01176b] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We have firstly demonstrated the photocatalytic utilization of a halide perovskite for combining reduction of CO2 with selective oxidation of methanol.
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Affiliation(s)
- Guang-Xing Dong
- MOE International Joint Laboratory of Materials Microstructure
- Institute for New Energy Materials and Low Carbon Technologies
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
| | - Wen Zhang
- MOE International Joint Laboratory of Materials Microstructure
- Institute for New Energy Materials and Low Carbon Technologies
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
| | - Yan-Fei Mu
- MOE International Joint Laboratory of Materials Microstructure
- Institute for New Energy Materials and Low Carbon Technologies
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
| | - Ke Su
- MOE International Joint Laboratory of Materials Microstructure
- Institute for New Energy Materials and Low Carbon Technologies
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
| | - Min Zhang
- MOE International Joint Laboratory of Materials Microstructure
- Institute for New Energy Materials and Low Carbon Technologies
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
| | - Tong-Bu Lu
- MOE International Joint Laboratory of Materials Microstructure
- Institute for New Energy Materials and Low Carbon Technologies
- School of Materials Science and Engineering
- Tianjin University of Technology
- Tianjin 300384
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38
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He M, Wang C, Li J, Wu J, Zhang S, Kuo HC, Shao L, Zhao S, Zhang J, Kang F, Wei G. CsPbBr 3-Cs 4PbBr 6 composite nanocrystals for highly efficient pure green light emission. NANOSCALE 2019; 11:22899-22906. [PMID: 31763640 DOI: 10.1039/c9nr07096f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
All-inorganic perovskite CsPbBr3-Cs4PbBr6 composite nanocrystals (NCs) were synthesized via a convenient solution process without inert gas protection and systematically studied as green phosphors for light emitting diode (LED) applications. While colloidal composite NCs emit green color with an emission peak at around 515 nm, their thin films on top of blue GaN chips exhibit a redshift of ∼15-20 nm due to subsequential aggregation in solid state. The Commission Internationale De I'eclairage (CIE) chromaticity coordinates of the green LEDs assembled by composite NCs reached (0.201, 0.746) with nearly 100% green ratio. Moreover, the pure green LED displayed a luminous efficiency of 45 lm W-1 under 10 mA driving current. The colloidal CsPbBr3-Cs4PbBr6 composite NCs have the photoluminescence quantum yield (PLQY) as high as 74%. The high PLQY originates from cubic CsPbBr3 NCs well passivated by the zero-dimensional Cs4PbBr6 matrix, substantially suppressing the nonradiative recombination. The comparison between the green LEDs fabricated with pure and composite perovskites imply that the CsPbBr3-Cs4PbBr6 composites with higher quantum yield could be an effective way to get the brightness and the stability of pure green LEDs.
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Affiliation(s)
- Miao He
- Key Laboratory of Polar Materials and Devices (MOE) and Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
| | - Chunyun Wang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Jingzhou Li
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Jiang Wu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Siwei Zhang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Hao-Chung Kuo
- Department of Electrical Engineering and Computer Sciences and Tsinghua-Berkeley Shenzhen Institute (TBSI), University of California at Berkeley, Berkeley, California 94720, USA
| | - Liyang Shao
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shichao Zhao
- College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Jinzhong Zhang
- Key Laboratory of Polar Materials and Devices (MOE) and Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
| | - Feiyu Kang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Guodan Wei
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China and Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
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Liu RT, Zhai XP, Zhu ZY, Sun B, Liu DW, Ma B, Zhang ZQ, Sun CL, Zhu BL, Zhang XD, Wang Q, Zhang HL. Disentangling the Luminescent Mechanism of Cs 4PbBr 6 Single Crystals from an Ultrafast Dynamics Perspective. J Phys Chem Lett 2019; 10:6572-6577. [PMID: 31594309 DOI: 10.1021/acs.jpclett.9b02590] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
New all-inorganic perovskites like Cs4PbBr6 provide rich luminescent tools and particularly novel physical insights, including their zero-dimensional structure and controversial emitting mechanism. The ensuing debate over the origin of the luminescence of Cs4PbBr6 inspired us to tackle the issue through fabricating high-quality Cs4PbBr6 single crystals and employing ultrafast dynamics study. Upon photoexcitation, Cs4PbBr6 underwent dynamics steps distinct from that of CsPbBr3, including exciton migration to the defect level on a time scale of several hundred femtoseconds, exciton relaxation within the defect states on the picosecond time scale, and exciton recombination from the subnanosecond to nanosecond time scale. The observation disclosed that crystal defects of Cs4PbBr6 induced green emission while CsPbBr3 mainly relied on quantum confinement to emit at room temperature. The study provides an in-depth understanding of the photoinduced multistep dynamics steps of Cs4PbBr6 associated with display and photovoltaic applications, establishing Cs4PbBr6 as a new candidate for uses associated with the perovskite family of materials.
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Affiliation(s)
- 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
| | - Xin-Ping Zhai
- 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
| | - Zhi-Yuan Zhu
- 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
| | - Bing Sun
- 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
| | - Duan-Wu 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
| | - 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
| | - 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
| | - Chun-Lin Sun
- 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
| | - Bing-Li Zhu
- Xi'an Institute of Optics and Precision Mechanics , Chinese Academy of Sciences , Xi'an 710119 , China
| | - Xiao-Dong Zhang
- National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment , Harbin 150001 , 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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40
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Park S, An MN, Almeida G, Palazon F, Spirito D, Krahne R, Dang Z, De Trizio L, Manna L. CsPbX 3/SiO x (X = Cl, Br, I) monoliths prepared via a novel sol-gel route starting from Cs 4PbX 6 nanocrystals. NANOSCALE 2019; 11:18739-18745. [PMID: 31591610 DOI: 10.1039/c9nr07766a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We developed a facile synthesis of nanocomposite powders of CsPbX3 nanocrystals (NCs) embedded in silica. The synthesis starts from colloidal Cs4PbX6 NCs that are mixed with tetraethyl orthosilicate in the presence of nitric acid, which triggers the sol-gel reaction yielding the formation of SiOx and the conversion of starting NCs into CsPbX3 ones. The overall reaction delivers CsPbX3 NCs encased in a silica matrix. The resulting CsPbX3/SiOx nano-composite powders exhibited enhanced moisture and thermal stability in air. Also, when mixing different CsPbX3/SiOx samples having diverse anion compositions, no interparticle anion exchange processes were observed, which is a further indication that the silica matrix acts as a robust barrier surrounding the NCs. Finallly, we used these composites as down-converter phosphors on top of a blue light-emitting diode (LED), delivering nearly ideal white light emission with the Commission Internationale de l'Eclairage (CIE) color coordinates (0.32, 0.33).
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Affiliation(s)
- Sungwook Park
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy. and Department of Physics, Pukyong National University, Busan 608-737, Korea
| | - Mai Ngoc An
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy. and Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso, 31, 16146, Genova, Italy
| | - Guilherme Almeida
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
| | - Francisco Palazon
- Instituto de Ciencia Molecular, ICMol, Universidad de Valencia, C/ Catedrático J. Beltrán 2, 46980 Paterna, Spain
| | - Davide Spirito
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy. and IHP - Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, D-15236 Frankfurt, Oder, Germany
| | - Roman Krahne
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
| | - Zhiya Dang
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 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.
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41
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Wang Q, Wu W, Wu R, Yang S, Wang Y, Wang J, Chai Z, Han Q. Improved thermal stability of photoluminescence in Cs4PbBr6 microcrystals/CsPbBr3 nanocrystals. J Colloid Interface Sci 2019; 554:133-141. [DOI: 10.1016/j.jcis.2019.06.083] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/21/2019] [Accepted: 06/25/2019] [Indexed: 10/26/2022]
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42
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Gan Z, Zheng F, Mao W, Zhou C, Chen W, Bach U, Tapping P, Kee TW, Davis JA, Jia B, Wen X. The optical properties of Cs 4PbBr 6-CsPbBr 3 perovskite composites. NANOSCALE 2019; 11:14676-14683. [PMID: 31342028 DOI: 10.1039/c9nr04787e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although the optoelectronic applications of metal halide perovskites have been intensively investigated in recent years, the fundamental carrier dynamics of zero-dimensional (0D) Cs4PbBr6 perovskites has been relatively underexplored; in particular, the nature of the green fluorescence is highly debated. Nevertheless, the unique photophysical properties are of immense interest for a variety of potential applications. In this work, the green emission of the CsPbBr3-Cs4PbBr6 perovskite composites is studied using temperature dependent photoluminescence (PL). The PL spectra at different temperatures simultaneously contain two sub-peaks (520 nm and 550 nm), which are ascribed to the emissions of the band-edge and the defect trapped exciton of CsPbBr3. This finding will help to understand the controversial photoluminescence currently observed in different 0D Cs4PbBr6 perovskites.
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Affiliation(s)
- Zhixing Gan
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn 3122, Australia.
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43
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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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Abstract
CsPbBr3 and Cs4PbBr6 perovskite powders have been synthesized through a relatively simple low-temperature and low-cost method. Nanocrystalline films have also been deposited from solutions with four different molar compositions of binary salt precursors. Optical absorption, emission and excitation spectra have been performed in the UV-visible spectral range while X-ray diffraction (XRD) has been recorded to characterize the nanocrystal morphology for the different molar compositions. A preferential orientation of crystallites along the (024) crystalline plane has been observed as a function of the different deposition conditions in films growth. All the crystals show an absorption edge around 530 nm; Tauc plots of the absorption returned bandgaps ranging from 2.29 to 2.35 eV characteristic of CsPbBr3 phase. We attribute the UV absorption band peaked at 324 nm to the fundamental band-to-band transition for Cs4PbBr6. It was observed that the samples with the most ordered Cs4PbBr6 crystals exhibited the most intense emission of light, with a bright green emission at 520 nm, which are however due to the luminescence of the inclusion of CsPbBr3 nanoclusters into the Cs4PbBr6. The latter shows instead an intense UV emission. Differently, the pure CsPbBr3 powder did not show any intense fluorescent emission. The excitation spectra of the green fluorescent emission in all samples closely resemble the CsPbBr3 absorption with the peculiar dip around 324 nm as expected from density of state calculations reported in the literature.
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45
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Liu H, Sun C, Gao Z, Geng C, Shi S, Wang L, Su S, Bi W. Integration of Environmental Friendly Perovskites for High-efficiency White Light-emitting Diodes. NANOSCALE RESEARCH LETTERS 2019; 14:152. [PMID: 31049739 PMCID: PMC6497899 DOI: 10.1186/s11671-019-2980-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/14/2019] [Indexed: 06/09/2023]
Abstract
Perovskite quantum dots (QDs) have been widely used in white light-emitting diodes (WLEDs), due to their high quantum yield (QY), tunable bandgap, and simple preparation. However, the red-emitting perovskite QDs are usually containing iodine (I), which is not stable under continuous light irradiation. Herein, perovskite-based WLED is fabricated by lead-free bismuth (Bi)-doped inorganic perovskites Cs2SnCl6 and less-lead Mn-doped CsPbCl3 QDs, which emits white light with color coordinates of (0.334, 0.297). The Bi-doped Cs2SnCl6 and Mn-doped CsPbCl3 QDs both show excellent stability when kept in the ambient air. As benefits from this desired characteristic, the as-prepared WLED shows excellent stability along with operating time. These results can promote the application of inorganic perovskite QDs in the field of WLEDs.
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Affiliation(s)
- Hanxin Liu
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China
| | - Chun Sun
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China.
| | - Zhiyuan Gao
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China
| | - Chong Geng
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China
| | - Shuangshuang Shi
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China
| | - Le Wang
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China
| | - Sijing Su
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China
| | - Wengang Bi
- Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China.
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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: 569] [Impact Index Per Article: 113.8] [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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Li P, Yang D, Tan Y, Cao M, Zhong Q, Chen M, Hu H, Sun B, Xu Y, Zhang Q. Consecutive Interfacial Transformation of Cesium Lead Halide Nanocubes to Ultrathin Nanowires with Improved Stability. ACS APPLIED MATERIALS & INTERFACES 2019; 11:3351-3359. [PMID: 30592200 DOI: 10.1021/acsami.8b19219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Although all-inorganic CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) have been considered as a promising material for photoelectronic devices, their applications are still limited because of their poor stability and the lack of in-depth understanding. Here, we demonstrate a post-treatment method for the preparation of ultrathin CsPbX3 nanowires (NWs) by treating CsPbBr3 nanocubes with thiourea solution. A systematic study showed a consecutive interfacial transformation process, in which CsPbBr3 nanocubes were first converted to Cs4PbBr6 NCs in the presence of thiourea, followed by a further transformation to CsPbBr3 NCs through an interfacial CsX-stripping process. To reduce the surface energy, an oriented attachment process has been realized and CsPbBr3 NCs aggregated to form ultrathin NWs. The ultrathin CsPbBr3 NWs exhibited high photoluminescence quantum yield (up to 60%) and high resistance to water treatment, which can be attributed to the surface passivation by thiourea. In addition to thiourea, cysteine and thioacetamide that contain the thiol group can also be used to trigger this transformation. This work can not only offer a facile method for the synthesis of efficient and stable ultrathin CsPbBr3 NWs but also help to reveal the in-depth mechanisms which may be very useful in the field of metal halide perovskite NCs.
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Affiliation(s)
- Pengli Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Di Yang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Yeshu Tan
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Muhan Cao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Qixuan Zhong
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Min Chen
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Huicheng Hu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Baoquan Sun
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Yong Xu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
| | - Qiao Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , 199 Ren'ai Road , Suzhou , 215123 Jiangsu , People's Republic of China
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48
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Wei Y, Cheng Z, Lin J. An overview on enhancing the stability of lead halide perovskite quantum dots and their applications in phosphor-converted LEDs. Chem Soc Rev 2019; 48:310-350. [PMID: 30465675 DOI: 10.1039/c8cs00740c] [Citation(s) in RCA: 358] [Impact Index Per Article: 71.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Beyond the unprecedented success achieved in photovoltaics (PVs), lead halide perovskites (LHPs) have shown great potential in other optoelectronic devices. Among them, nanometer-scale perovskite quantum dots (PQDs) with fascinating optical properties including high brightness, tunable emission wavelength, high color purity, and high defect tolerance have been regarded as promising alternative down-conversion materials in phosphor-converted light-emitting diodes (pc-LEDs) for lighting and next-generation of display technology. Despite the promising applications of perovskite materials in various fields, they have received strong criticism for the lack of stability. The poor stability has also attracted much attention. Within a few years, numerous strategies towards enhancing the stability have been developed. This review summarizes the mechanisms of intrinsic- and extrinsic-environment-induced decomposition of PQDs. Simultaneously, the strategies for improving the stability of PQDs are reviewed in detail, which can be classified into four types: (1) compositional engineering; (2) surface engineering; (3) matrix encapsulation; (4) device encapsulation. Finally, the challenges for applying PQDs in pc-LEDs are highlighted, and some possible solutions to improve the stability of PQDs together with suggestions for further improving the performance of pc-LEDs as well as the device lifetime are provided.
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Affiliation(s)
- Yi Wei
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
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49
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Huang S, Yang S, Wang Q, Wu R, Han Q, Wu W. Cs4PbBr6/CsPbBr3 perovskite composites for WLEDs: pure white, high luminous efficiency and tunable color temperature. RSC Adv 2019; 9:42430-42437. [PMID: 35542845 PMCID: PMC9076697 DOI: 10.1039/c9ra10183g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 12/15/2019] [Indexed: 12/18/2022] Open
Abstract
Cs4PbBr6/CsPbBr3 perovskite composites are fabricated by room-temperature one-pot mixing synthesis, which is short in time, free from inert gases and delivers a high product yield. Temperature-dependent photoluminescence shows that a larger exciton binding energy of 291.1 meV exhibits better thermal stability compared with that of pure Cs4PbBr6 and CsPbBr3 materials. The CIE chromaticity coordinates (0.1380, 0.7236) of green LEDs designed with Cs4PbBr6/CsPbBr3 perovskite composites show almost no variation under driving current changing from 5 to 30 mA. Furthermore, the ground Cs4PbBr6/CsPbBr3 perovskite composites mixed with red emitting K2SiF6:Mn4+ phosphor are dropped and casted on a blue-emitting InGaN chip. The white light emitting diodes (WLEDs) are presented, which have good luminous efficiency of 65.33 lm W−1 at 20 mA, a correlated color temperature of 5190 K, and the white gamut with chromaticity coordinate of (0.3392, 0.3336). According to the state of art, these excellent characteristics observed are much superior to the reported results of conventional perovskite-based WLEDs, which demonstrate the immense potential and great prospect of Cs4PbBr6/CsPbBr3 perovskite composites to replace conventional phosphors in lighting devices. WLED devices are designed with high luminous efficiency of 65.33 lm W−1 and excellent CIE chromaticity coordinates of (0.3392, 0.3336). The properties of material and the luminous performance of device are calculated and discussed comprehensively.![]()
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Affiliation(s)
- Shangxuan Huang
- School of Electronic Engineering
- Heilongjiang University
- Harbin
- China
| | - Sen Yang
- School of Electronic Engineering
- Heilongjiang University
- Harbin
- China
| | - Qi Wang
- School of Electronic Engineering
- Heilongjiang University
- Harbin
- China
| | - Ruirui Wu
- School of Electronic Engineering
- Heilongjiang University
- Harbin
- China
| | - Qiuju Han
- School of College of Arts and Sciences
- Northeast Agricultural University
- Harbin
- China
| | - Wenzhi Wu
- School of Electronic Engineering
- Heilongjiang University
- Harbin
- China
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Guan Q, Su R, Zhang M, Zhang R, Li W, Wang D, Xu M, Fei L, Xu Q. Highly fluorescent dual-emission red carbon dots and their applications in optoelectronic devices and water detection. NEW J CHEM 2019. [DOI: 10.1039/c8nj06074f] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Synthesis of dual-emission nitrogen and sulfur co-doped (N,S)-CDs with a quantum yield up to 29.7% and their applications in white LEDs and water detection.
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Affiliation(s)
- Qingwen Guan
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing
- China
| | - Rigu Su
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing
- China
| | - Miaoran Zhang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing
- China
| | - Rui Zhang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing
- China
| | - Weijun Li
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing
- China
| | - Dong Wang
- Scientific Research Division of the Medical Administration Department
- Department of Orthopedics
- PLA General Hospital
- 100853 Beijing
- China
| | - Meng Xu
- Scientific Research Division of the Medical Administration Department
- Department of Orthopedics
- PLA General Hospital
- 100853 Beijing
- China
| | - Ling Fei
- Chemical Engineering Department
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Quan Xu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing
- China
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