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溶液法制备CsPbBr3钙钛矿薄膜微观结构控制与发光特性
Microstructure and Luminescence Characteristics of CsPbBr3 Perovskite Films by Solution Process
- 发光学报 2020年41卷第7期 页码：775-781
- 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：
[ "郑悦婷(1994-), 女, 福建漳州人, 硕士研究生, 2017年于福州大学获得学士学位, 主要从事钙钛矿量子点合成及其发光特性的研究。E-mail:617240938@qq.com" ]
[ "李福山(1978-), 男, 福建莆田人, 博士, 研究员, 博士研究生导师, 2005年于北京大学获得博士学位, 主要从事纳米光电材料与器件的研究。E-mail:fsli@fzu.edu.cn" ]
- 基金信息：国家自然科学基金(U1605244);国家重点研发计划(2016YFB0401305)
DOI：10.37188/fgxb20204107.0775
中图分类号： O482.31纸质出版日期：2020-7，
收稿日期：2020-5-3，
录用日期：2020-5-12
扫 描 看 全 文
郑悦婷, 郑鑫, 胡海龙, 等. 溶液法制备CsPbBr3钙钛矿薄膜微观结构控制与发光特性[J]. 发光学报, 2020,41(7):775-781.
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.
郑悦婷, 郑鑫, 胡海龙, 等. 溶液法制备CsPbBr3钙钛矿薄膜微观结构控制与发光特性[J]. 发光学报, 2020,41(7):775-781. DOI： 10.37188/fgxb20204107.0775.
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
3
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.
关键词
钙钛矿原位生长结构特性发光特性前驱液浓度
Keywords
perovskitein situ growthstructure characteristicsluminescence characteristicsprecursor concentration
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