1
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Kim SH, Jo YR, Yim SY, Lee HS. Reaction-controlled shape evolution and insights into the growth mechanism of CsPbBr 3 nanocrystals. J Colloid Interface Sci 2024; 677:697-703. [PMID: 39116567 DOI: 10.1016/j.jcis.2024.07.257] [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: 06/08/2024] [Revised: 07/20/2024] [Accepted: 07/30/2024] [Indexed: 08/10/2024]
Abstract
The correlation between structural transformation and optical characteristics of cesium lead bromide (CsPbBr3) nanocrystals (NCs) suggests insights into their growth mechanism and optical performance. Systematic control of reaction parameters led to the successful fabrication of on-demand shape-morphing CsPbBr3 NCs. Transmission electron microscopy observations showed that the shape transformation from nanocubes to microcrystals could be accelerated by increasing the precursor:ligand molar ratio and reaction time. Further evidence for orthorhombic CsPbBr3 NCs was obtained from their selected-area electron diffraction pattern, which exhibits a twin domain induced by the presence of large NCs. Likewise, we observed a substantial decrease in photoluminescence (PL) intensity of CsPbBr3 due to surface decomposition or surface ligand loss resulting from increased size. In addition, fusion of smaller particles having other dimensionality induced the increase in the PL full-width at half maximum. In particular, existence of larger bulk material caused a reduction in the peak intensity in the absorption spectra and a trend of decreasing tendency in intensity of the absorption bands related to bromoplumbate species provided direct evidence of fully converted Cs-oleate.
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Affiliation(s)
- Sung Hun Kim
- Department of Physics, Research Institute Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Yong-Ryun Jo
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Sang-Youp Yim
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea.
| | - Hong Seok Lee
- Department of Physics, Research Institute Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Republic of Korea.
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2
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Zhang C, Wang Z, Da Z, Shi J, Wang J, Xu Y, Gaponenko NV, Bhatti AS, Wang M. One-Step Preparation of High-Stability CsPbX 3/CsPb 2X 5 Composite Microplates with Tunable Emission. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38598608 DOI: 10.1021/acsami.4c00178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The core-shell structure is an effective means to improve the stability and optoelectronic properties of cesium lead halide (CsPbX3 (X = Cl, Br, I)) perovskite quantum dots (QDs). However, confined by the ionic radius differences, developing a core-shell packaging strategy suitable for the entire CsPbX3 system remains a challenge. In this study, we introduce an optimized hot-injection method for the epitaxial growth of the CsPb2X5 substrate on CsPbX3 surfaces, achieved by precisely controlling the reaction time and the ratio of lead halide precursors. The synthesized CsPbX3/CsPb2X5 composite microplates exhibit an emission light spectrum that covers the entire visible range. Crystallographic analyses and density functional theory (DFT) calculations reveal a minimal lattice mismatch between the (002) plane of CsPb2X5 and the (11 ¯ 0) plane of CsPbX3, facilitating the formation of high-quality type-I heterojunctions. Furthermore, introducing Cl- and I- significantly alters the surface energy of CsPb2X5's (110) plane, leading to an evolutionary morphological shift of grains from circular to square microplates. Benefiting from the passivation of CsPb2X5, the composites exhibit enhanced optical properties and stability. Subsequently, the white light-emitting diode prepared using the CsPbX3/CsPb2X5 composite microplates has a high luminescence efficiency of 136.76 lm/W and the PL intensity decays by only 3.6% after 24 h of continuous operation.
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Affiliation(s)
- Chen Zhang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zeyu Wang
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an, Shaanxi 710049 China
| | - Zheyuan Da
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jindou Shi
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Junnan Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Youlong Xu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Nikolai V Gaponenko
- Belarusian State University of Informatics and Radioelectronics, P. Browki 6, Minsk 220013, Belarus
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad, 44500 Pakistan
- Virtual University of Pakistan, 5 Atta Turk Avenue, Sector G-5/1, Islamabad 44000, Pakistan
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an, 710049, China
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3
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Zhang T, Bai Y, Feng S, Xue Q, Hu X, Xu X, Liu H, Luponosov YN, Niazi MBK, Li X. Mechanical milling processed highly luminescent Cs-Pb-Br perovskite emitters. Chem Commun (Camb) 2023; 59:11827-11830. [PMID: 37712301 DOI: 10.1039/d3cc01345f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
We report well-dispersed highly emitting perovskite emitters synthesized via the surfactant-assisted ball-milling method. Both the emitting peaks and the colour purity of the synthesized perovskite emitters can be effectively tuned through additive functionalization and precursor engineering.
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Affiliation(s)
- Teng Zhang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
| | - Youru Bai
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
| | - Shaohuan Feng
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
| | - Qifan Xue
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
- Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
| | - Xiaotian Hu
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC)/Jiangxi Provincial Key Laboratory of New Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Xueqing Xu
- Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
| | - Heyuan Liu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
| | - Yuriy N Luponosov
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Moscow 117393, Russia
| | - Muhammad Bilal Khan Niazi
- School of Chemical & Materials Engineering, National University of Sciences & Technology, Islamabad, Pakistan
| | - Xiyou Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.
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4
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Wamsley M, Peng W, Tan W, Wathudura P, Cui X, Zou S, Zhang D. Total Luminescence Spectroscopy for Quantification of Temperature Effects on Photophysical Properties of Photoluminescent Materials. ACS MEASUREMENT SCIENCE AU 2023; 3:10-20. [PMID: 36817009 PMCID: PMC9936609 DOI: 10.1021/acsmeasuresciau.2c00047] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 06/18/2023]
Abstract
Quantification of the temperature effects on the optical properties of photoluminescent (PL) materials is important for a fundamental understanding of both materials optical processes and rational PL materials design and applications. However, existing techniques for studying the temperature effects are limited in their information content. Reported herein is a temperature-dependent total photoluminescence (TPL) spectroscopy technique for probing the temperature dependence of materials optical properties. When used in combination with UV-vis measurements, this TPL method enables experimental quantification of temperature effects on fluorophore fluorescence intensity and quantum yield at any combination of excitation and detection wavelengths, including the fluorophore Stokes-shifted and anti-Stokes-shifted fluorescence. All model polyaromatic hydrocarbon (PAH) and xanthene fluorophores exhibited a strong excitation- and emission-wavelength dependence in their temperature effects. However, the heavy-atom effects used for explaining the strong temperature dependence of brominated anthracenes are not operative with xanthene fluorophores that have heavy atom substitutions. The insights from TPL measurements are important not only for enhancing the fundamental understandings of the materials photophysical properties but also for rational measurement design for applications where the temperature sensitivity of the fluorophore fluorescence is critical. An example application is demonstrated for developing a sensitive and robust ratiometric fluorescence thermometric method for in situ real-time monitoring of sample temperatures inside a fluorescence cuvette placed in a temperature-controlled sample holder.
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Affiliation(s)
- Max Wamsley
- Department
of Chemistry, Mississippi University, Mississippi State, Mississippi 39759, United States
| | - Weiyu Peng
- Department
of Chemistry, Mississippi University, Mississippi State, Mississippi 39759, United States
| | - Weinan Tan
- Department
of Chemistry, Mississippi University, Mississippi State, Mississippi 39759, United States
| | - Pathum Wathudura
- Department
of Chemistry, Mississippi University, Mississippi State, Mississippi 39759, United States
| | - Xin Cui
- Department
of Chemistry, Mississippi University, Mississippi State, Mississippi 39759, United States
| | - Shengli Zou
- Department
of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Dongmao Zhang
- Department
of Chemistry, Mississippi University, Mississippi State, Mississippi 39759, United States
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5
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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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6
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Zhu Z, Zeng S, Chen Q, Yang L, Wei C, Chen B, Yu H, Li H, Zhang J, Huang X. One-step synthesis of epitaxial 3D/2D metal halide perovskite heterostructures. Chem Commun (Camb) 2022; 58:13775-13778. [PMID: 36426914 DOI: 10.1039/d2cc05150h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Facile and scalable synthesis of perovskite heterostructures with well-controlled heterointerfaces remains challenging. Herein, we developed a simple one-step solution method to prepare 3D/2D CsPbBr3/PEA2PbBr4 perovskite heterostructures with a well-defined epitaxial structure in the gram scale. The formation mechanism was detailed by using in situ time-resolved photoluminescence (PL) spectroscopy analysis. In addition, a series of 3D/2D epitaxial heterostructures were also prepared by changing the organic cations or halogen anions. Due to the effective charge separation and transfer, photodetectors based on the type-II 3D/2D CsPbBr3/PEA2PbBr4 heterostructures showed up to 120 times higher photoresponsivities and 50 times higher on/off ratios compared to devices based on single component perovskites.
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Affiliation(s)
- Zhaohua Zhu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China. .,Department of Chemistry, City University of Hong Kong, Hong Kong SAR 999077, P. R. China
| | - Shaoyu Zeng
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.
| | - Qian Chen
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NWPU), 127 West Youyi Road, Xi'an 710072, P. R. China
| | - Lei Yang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.
| | - Cong Wei
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.
| | - Bo Chen
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR 999077, P. R. China
| | - Haidong Yu
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NWPU), 127 West Youyi Road, Xi'an 710072, P. R. China
| | - Hai Li
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.
| | - Jian Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.
| | - Xiao Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.
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7
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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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8
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Chen T, Wang C, Xing X, Qin Z, Qin F, Wang Y, Alam MK, Hadjiev VG, Yang G, Ye S, Yang J, Wang R, Yue S, Zhang D, Shang Z, Robles-Hernandez FC, Calderon HA, Wang H, Wang Z, Bao J. Integration of Highly Luminescent Lead Halide Perovskite Nanocrystals on Transparent Lead Halide Nanowire Waveguides through Morphological Transformation and Spontaneous Growth in Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105009. [PMID: 35060296 DOI: 10.1002/smll.202105009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The integration of highly luminescent CsPbBr3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing, and quantum communications. On the other hand, CsPb2 Br5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here, the growth of CsPbBr3 nanocrystals on CsPb2 Br5 nanowires is reported first by simply immersing CsPbBr3 powder into pure water, CsPbBr3- γ Xγ (X = Cl, I) nanocrystals on CsPb2 Br5 -γ Xγ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in situ monitoring, reveal that CsPbBr3 powder is first converted to CsPb2 Br5 microplatelets in water, followed by morphological transformation from CsPb2 Br5 microplatelets to nanowires, which is a kinetic dissolution-recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb2 Br5 . CsPbBr3 nanocrystals are spontaneously formed on CsPb2 Br5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence, and SEM imaging confirm that the bright emission originates from CsPbBr3 -γ Xγ nanocrystals while CsPb2 Br5 -γ Xγ nanowires are transparent waveguides. The intimate integration of nanoscale light sources with a nanowire waveguide is demonstrated through the observation of the wave guiding of light from nanocrystals and Fabry-Perot interference modes of the nanowire cavity.
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Affiliation(s)
- Tao Chen
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Chong Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Xinxin Xing
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Zhaojun Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Fan Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Yanan Wang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Md Kamrul Alam
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Viktor G Hadjiev
- Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
| | - Guang Yang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shuming Ye
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Jie Yang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Rongfei Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Shuai Yue
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Di Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zhongxia Shang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Francisco C Robles-Hernandez
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Mechanical Engineering Technology, University of Houston, Houston, TX, 77204, USA
| | - Hector A Calderon
- Instituto Politecnico Nacional, ESFM-IPN, UPALM, Departamento de Física, Mexico CDMX, 07338, Mexico
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Jiming Bao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
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9
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Cheng X, Han Y, Cui B. Fabrication Strategies and Optoelectronic Applications of Perovskite Heterostructures. ADVANCED OPTICAL MATERIALS 2022; 10. [DOI: 10.1002/adom.202102224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Indexed: 09/01/2023]
Abstract
AbstractMetal halide perovskites (MHPs) are emerging low‐cost and multifunctional semiconductor materials. They have been widely used in optoelectronic devices such as perovskite solar cells, light‐emitting diodes, photodetectors, memristors, and lasers. Developing new MHPs, defects passivation, optimizing device structures, and packaging techniques are all effective methods to improve photoelectric performance and stability of perovskite devices. Particularly, the fabrication of perovskite/perovskite heterostructures (PPHSs) is a novel and arresting method to obtain stable and high‐performing optoelectronic perovskite devices since it can passivate defects, regulate energy gaps, and provide new carrier transmission modes of MHPs for multiple semiconductor applications. In this paper, representative fabrication strategies of PPHSs including films and single‐crystal heterostructures are reviewed, and their applications in optoelectronic devices are summarized. Furthermore, the challenges and prospects of PPHSs are discussed based on the current status.
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Affiliation(s)
- Xiaohua Cheng
- Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing 100081 P. R. China
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 P. R. China
| | - Ying Han
- Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing 100081 P. R. China
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 P. R. China
| | - Bin‐Bin Cui
- Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing 100081 P. R. China
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 P. R. China
- School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 P. R. China
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10
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Wen Z, Xie F, Choy WCH. Stability of electroluminescent perovskite quantum dots light‐emitting diode. NANO SELECT 2021. [DOI: 10.1002/nano.202100203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Zhuoqi Wen
- Academy for Engineering and Technology Fudan University Shanghai China
| | - Fengxian Xie
- Academy for Engineering and Technology Fudan University Shanghai China
- Institute for Electric Light Sources, School of Information Science and Technology Fudan University Shanghai China
| | - Wallace. C. H. Choy
- Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong China
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11
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Xing K, Cao S, Yuan X, Zeng R, Li H, Zou B, Zhao J. Thermal and photo stability of all inorganic lead halide perovskite nanocrystals. Phys Chem Chem Phys 2021; 23:17113-17128. [PMID: 34346439 DOI: 10.1039/d1cp02119b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Inorganic lead halide perovskite (ILHP) nanocrystals (NCs) show great potential in solid state lighting and next generation display technology due to their excellent optical properties. However, almost all ILHP NCs are still facing the problem of unstable luminescence properties caused by heating and/or UV illumination. Further improving the thermal and photo stability of ILHP NCs has become the most urgent challenge for their practical application. This Perspective review specifically focuses on the thermal and photo stability of ILHP NCs, discusses and analyzes the factors that affect the thermal and photo stability of ILHP NCs from the perspective of surface ligands and structure composition, summarizes the current strategies to improve the thermal and photo stability of ILHP NCs, and presents the key challenges and perspectives on the research for the improvement of thermal and photo stability of ILHP NCs.
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Affiliation(s)
- Ke Xing
- School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
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12
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Abstract
We synthesized CsPbBr3 perovskite nanocrystals (NCs) at different reaction temperatures and tracked their growth kinetics on the basis of their optical properties and estimated size. The energies of the absorption and fluorescence (FL) peaks with increasing reaction temperature for the CsPbBr3 perovskite NCs were tuned within the regions of 2.429–2.570 eV and 2.391–2.469 eV, respectively, depending on size of the NCs (9.9–12.5 nm). The Stokes shifts of CsPbBr3 perovskite NCs with increasing NC size decreased from 101 meV to 38 meV. The full-width at half-maximum of the FL peaks for the CdSe NCs decreased from 150 meV to 90 meV because of the improved size uniformity of the CsPbBr3 perovskite NCs. The energy spacing of CsPbBr3 perovskite NCs synthesized at various reaction temperatures was calculated from Tauc plots; this information is critical for determining the bandgap energy and enables the size of the CsPbBr3 perovskite NCs to be estimated using the effective mass approximation.
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13
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Park YR, Eom S, Kim HH, Choi WK, Kang Y. Self-defect-passivation by Br-enrichment in FA-doped Cs 1-xFA xPbBr 3 quantum dots: towards high-performance quantum dot light-emitting diodes. Sci Rep 2020; 10:14758. [PMID: 32901051 PMCID: PMC7479606 DOI: 10.1038/s41598-020-71666-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/21/2020] [Indexed: 11/09/2022] Open
Abstract
Halide vacancy defect is one of the major origins of non-radiative recombination in the lead halide perovskite light emitting devices (LEDs). Hence the defect passivation is highly demanded for the high-performance perovskite LEDs. Here, we demonstrated that FA doping led to the enrichment of Br in Cs1−xFAxPbBr3 QDs. Due to the defect passivation by the enriched Br, the trap density in Cs1−xFAxPbBr3 significantly decreased after FA doping, and which improved the optical properties of Cs1−xFAxPbBr3 QDs and their QD-LEDs. PLQY of Cs1–xFAxPbBr3 QDs increased from 76.8% (x = 0) to 85.1% (x = 0.04), and Lmax and CEmax of Cs1–xFAxPbBr3 QD-LEDs were improved from Lmax = 2880 cd m−2 and CEmax = 1.98 cd A−1 (x = 0) to Lmax = 5200 cd m−2 and CEmax = 3.87 cd A−1 (x = 0.04). Cs1–xFAxPbBr3 QD-LED device structure was optimized by using PVK as a HTL and ZnO modified with b-PEI as an ETL. The energy band diagram of Cs1–xFAxPbBr3 QD-LEDs deduced by UPS analyses.
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Affiliation(s)
- Young Ran Park
- Institute of Nano Science and Technology (INST), Hanyang University, Seongdong-gu, Seoul, 04763, South Korea
| | - Sangwon Eom
- Department of Chemistry, Hanyang University, Seongdong-gu, Seoul, 04763, South Korea
| | - Hong Hee Kim
- Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seongbuk-gu, Seoul, 02792, South Korea.,Department of Materials Science and Engineering, Yonsei University, Seodaemun-gu, Seoul, 03722, South Korea
| | - Won Kook Choi
- Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seongbuk-gu, Seoul, 02792, South Korea
| | - Youngjong Kang
- Institute of Nano Science and Technology (INST), Hanyang University, Seongdong-gu, Seoul, 04763, South Korea. .,Department of Chemistry, Hanyang University, Seongdong-gu, Seoul, 04763, South Korea. .,Research Institute for Natural Sciences, Hanyang University, Seoul, 04763, South Korea.
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14
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Huang ZP, Ma B, Wang H, Li N, Liu RT, Zhang ZQ, Zhang XD, Zhao JH, Zheng PZ, Wang Q, Zhang HL. In Situ Growth of 3D/2D (CsPbBr 3/CsPb 2Br 5) Perovskite Heterojunctions toward Optoelectronic Devices. J Phys Chem Lett 2020; 11:6007-6015. [PMID: 32628484 DOI: 10.1021/acs.jpclett.0c01757] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-dimensional (2D) CsPb2Br5 exhibits intriguing functions in enhancing the performance of optoelectronic devices in terms of environmental stability and luminescence properties when composited with other perovskites in different dimensionalities. We built a type I three-dimensional (3D) CsPbBr3/2D CsPb2Br5 heterojunction through phase transition where CsPbBr3 quantum dots in situ grew into 2D CsPb2Br5. A thorough growth mechanism study in combination with excited state dynamic investigations via femtosecond spectroscopy and first-principles calculations revealed that the type I hierarchy enhanced the stability of the heterojunction and spurred its luminous quantum yield by prolonging the lifetime of photogenerated carriers. Mixing the heterojunction with other phosphors yielded white-light-emitting diodes with a color rendering index of 94%. The work thus not only offered one new avenue for building heterojunctions by using the "soft crystal" nature of perovskites but also disentangled the enhanced luminescence mechanism of the heterojunction that can be harnessed for promising applications in the luminescence and display fields.
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Affiliation(s)
- Zhi-Peng Huang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Bo Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Na Li
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Rui-Tong Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Ze-Qi Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Dong Zhang
- National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Harbin 150001, China
| | - Ji-Hua Zhao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Pei-Zhu Zheng
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Qiang Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
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15
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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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16
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Yang JN, Song Y, Yao JS, Wang KH, Wang JJ, Zhu BS, Yao MM, Rahman SU, Lan YF, Fan FJ, Yao HB. Potassium Bromide Surface Passivation on CsPbI3-xBrx Nanocrystals for Efficient and Stable Pure Red Perovskite Light-Emitting Diodes. J Am Chem Soc 2020; 142:2956-2967. [DOI: 10.1021/jacs.9b11719] [Citation(s) in RCA: 146] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jun-Nan Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yang Song
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ji-Song Yao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kun-Hua Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jing-Jing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bai-Sheng Zhu
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ming-Ming Yao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Sami Ur Rahman
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yi-Feng Lan
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Feng-Jia Fan
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Microscale Magnetic Resonance, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hong-Bin Yao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
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17
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Yao MM, Jiang CH, Yao JS, Wang KH, Chen C, Yin YC, Zhu BS, Chen T, Yao HB. General Synthesis of Lead-Free Metal Halide Perovskite Colloidal Nanocrystals in 1-Dodecanol. Inorg Chem 2019; 58:11807-11818. [DOI: 10.1021/acs.inorgchem.9b01893] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Lou S, Zhou Z, Xuan T, Li H, Jiao J, Zhang H, Gautier R, Wang J. Chemical Transformation of Lead Halide Perovskite into Insoluble, Less Cytotoxic, and Brightly Luminescent CsPbBr 3/CsPb 2Br 5 Composite Nanocrystals for Cell Imaging. ACS APPLIED MATERIALS & INTERFACES 2019; 11:24241-24246. [PMID: 31245989 DOI: 10.1021/acsami.9b05484] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Lead halide perovskite nanocrystals (NCs) have been widely investigated owing to their potential applications as optoelectronic devices. However, these materials suffer from poor water stability, which make them impossible to be applied in biomedicine. Here, insoluble CsPbBr3/CsPb2Br5 composite NCs were successfully synthesized via simple water-assisted chemical transformation of perovskite NCs. Water plays two key roles in this synthesis: (i) stripping CsBr from CsPbBr3/Cs4PbBr6 and (ii) modifying the coordination number of Pb2+ (six in CsPbBr3 and Cs4PbBr6 vs eight in CsPb2Br5). The as-prepared CsPbBr3/CsPb2Br5 composite NCs not only retain the photoluminescence quantum yield (up to 80%) and a narrow full width to half-maximum of 16 nm, but also present excellent water stability and low cytotoxicity. With these properties, the CsPbBr3/CsPb2Br5 composite NCs were demonstrated as efficient fluorescent probes in live HeLa cells. We believe that our finding not only provides a new method to prepare insoluble, narrow-band, and brightly luminescent CsPbBr3/CsPb2Br5 composite NCs, but also extend the potential applications of lead halides in biomedicine.
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Affiliation(s)
- Sunqi Lou
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
| | - Zhi Zhou
- Hunan Provincial Engineering Technology Research Center for Optical Agriculture College of Science , Hunan Agricultural University , Changsha 410128 , China
| | - Tongtong Xuan
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
| | - Huili Li
- Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science , East China Normal University , Shanghai 200062 , China
| | - Ju Jiao
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
| | - Hongwu Zhang
- Key Lab of Urban Pollutant Conversion , Institute of Urban Environment, Chinese Academy of Sciences , Xiamen , Fujian 361021 , China
| | - Romain Gautier
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
- Institut des Matériaux Jean Rouxel (IMN) , Université de Nantes , 2 rue de la Houssinière , BP 32229, 44322 Nantes cedex 3 , France
| | - Jing Wang
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Materials Science and Engineering , Sun Yat-Sen University , Guangzhou 510275 , China
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Yan F, Demir HV. LEDs using halide perovskite nanocrystal emitters. NANOSCALE 2019; 11:11402-11412. [PMID: 31179462 DOI: 10.1039/c9nr03533h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The emerging family of lead-halide perovskite (LHP) nanocrystal emitters has shown impressive achievements in solid-state light-emitting applications. With luminous efficiency comparable to that of organic light-emitting diodes, LHP light-emitting diodes (PeLEDs) have demonstrated a wide colour gamut with high colour purity and a widely tunable range of emissive wavelengths across the whole visible range. Herein, the understanding of LHP nanocrystals in light emission and the resulting PeLEDs are reviewed. Additionally, key features of LHP nanocrystal emitters applied in PeLEDs and guidelines towards realizing high-performance devices are discussed.
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Affiliation(s)
- Fei Yan
- LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, TPI-The Photonics Institute, School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore.
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Zhang T, Chen Z, Shi Y, Xu QH. The photoluminescence mechanism of CsPb 2Br 5 microplates revealed by spatially resolved single particle spectroscopy. NANOSCALE 2019; 11:3186-3192. [PMID: 30723854 DOI: 10.1039/c8nr10110h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
CsPb2Br5 is a new member of the all-inorganic lead halide perovskite family with unique structures and optoelectronic properties for various applications. As an indirect band gap semiconductor, the photoluminescence (PL) mechanism of CsPb2Br5 is still under debate. To resolve this issue, CsPb2Br5 microplates with strong green PL have been prepared by a hot-injection method. Characterization by transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis and ultraviolet-visible (UV-vis) absorption spectroscopy indicates the existence of a small amount of embedded CsPbBr3 phase. The removal of the embedded CsPbBr3 phase by treatment with water containing ethanol solvent resulted in complete PL quenching, suggesting the origin of PL due to the embedded CsPbBr3 phase. Spatially resolved PL and time-resolved PL mapping have been further employed to directly visualize the spatial distribution of different emission centers. Our single particle spectroscopic studies indicated the existence of three different emission centers with different PL lifetimes: two types of embedded CsPbBr3 phases (clumped and randomly distributed CsPbBr3 nanocrystals) and intrinsic defects of CsPb2Br5. The embedded CsPbBr3 phases with fast and intermediate PL lifetimes are the primary contributors to PL of the CsPb2Br5 microplates while their intrinsic defects with slow PL lifetimes make only a minor contribution. These studies have unambiguously clarified the PL mechanisms of the CsPb2Br5 microplates and provided the direct mapping of different emission centers, which resolve the contradictory explanation and debate about the PL mechanism of the CsPb2Br5 microplates.
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Affiliation(s)
- Tianxiang Zhang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
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