Microstructure and Luminescence Characteristics of CsPbBr<sub>3</sub> Perovskite Films by Solution Process

Yue-ting ZHENG; Xin ZHENG; Hai-long HU; Tai-liang GUO; Jin-tang LIN; Fu-shan LI

doi:10.37188/fgxb20204107.0775

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Microstructure and Luminescence Characteristics of CsPbBr₃ Perovskite Films by Solution Process

Synthesis and Properties of Materials | 更新时间：2020-09-10

- Microstructure and Luminescence Characteristics of CsPbBr₃ Perovskite Films by Solution Process
- Chinese Journal of Luminescence Vol. 41, Issue 7, Pages: 775-781(2020)
- 作者机构：
  
  福州大学物理与信息工程学院, 平板显示技术国家地方联合工程实验室, 福建福州 350108
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;National Key Research & Development Pro
- DOI：10.37188/fgxb20204107.0775
  CLC： O482.31
- Received：03 May 2020，
  
  Accepted：12 May 2020，
  
  Published：2020-07
- 稿件说明：
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Yue-ting ZHENG, Xin ZHENG, Hai-long HU, et al. Microstructure and Luminescence Characteristics of CsPbBr₃ Perovskite Films by Solution Process[J]. Chinese journal of luminescence, 2020, 41(7): 775-781.
DOI：

Yue-ting ZHENG, Xin ZHENG, Hai-long HU, et al. Microstructure and Luminescence Characteristics of CsPbBr₃ Perovskite Films by Solution Process[J]. Chinese journal of luminescence, 2020, 41(7): 775-781. DOI： 10.37188/fgxb20204107.0775.

摘要

近年来，金属卤化物钙钛矿以其光吸收系数高、色纯度高、色域广、发光波长连续可调、光致发光量子产率高、载流子扩散长度大和成分稳定不易分解等优点，成为光电子应用领域极具潜力的新材料，其在太阳能电池、发光二极管、忆阻器、激光器、光电探测器和防伪标签等方面均有出色的表现，并且可通过简单的全溶液法制备，为印刷工艺的结合、大尺寸生产和产业化提供了可能。实验采用一步溶液法制备了原位生长的溴化铅铯钙钛矿薄膜，其在（100）晶面有择优取向，且相应的晶面间距小于PDF标准卡片值。通过增大前驱液的浓度，使样品的形貌结构产生差异，薄膜的连续性和致密性随之提高，晶粒得到细化，在375 nm激发光下的光致发光（PL）强度得到约5倍的提升，且PL峰位蓝移6 nm，同时该过程导致的晶格畸变使其PL光谱半高宽（FWHM）增大超过2 nm。

Abstract

In recent years

metal halide perovskites have become new promising materials in the field of optoelectronic applications due to the advantages of high optical absorption coefficient

high color purity

wide color gamut

continuously adjustable luminescence wavelength

high photoluminescence quantum yield

large carrier diffusion length

stable ingredients and not easy to decompose

and have excellent performance in solar cells

light-emitting diodes

memristors

lasers

photodetectors and anti-counterfeiting labels. Furthermore

perovskites can be made by simple methods like solution synthesis

which provides the possibility of combining it with the printing process

large-scale production and industrialization. In this experiment

solution-processed CsPbBr

perovskite films grown

in situ

have a preferred orientation on the (100) crystal plane

and its interplanar spacing is smaller than the value from PDF standard card. As the concentration of precursor increases

the morphological structure of samples varied

continuity and compactness of films were improved

crystal grains were refined

the photoluminescence(PL) intensity excited by light at 375 nm was approximately 5 times original

the PL peak position blue shifted by 6 nm

and the lattice distortion caused by this process increased the full width at half maximum(FWHM) of the PL spectrum by more than 2 nm.

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Microstructure and Luminescence Characteristics of CsPbBr3 Perovskite Films by Solution Process

DOI：10.37188/fgxb20204107.0775

摘要

Abstract

关键词

Keywords

references

Microstructure and Luminescence Characteristics of CsPbBr₃ Perovskite Films by Solution Process