LI Xiao1, XUE Zhen-jie2, WANG Jing2, HUANG Chuan-hui2, LIU Li-zhi2, QIAO Xue-zhi2, LIU Cong2, SONG Qian2, LI Ying-chun1
（1.School of Materials Science and Engineering, North University of China, Taiyuan 030051, China；2. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, nstitute of Chemistry of Chinese Academy of Sciences, Beijing 100090, China）
Abstract： Hybrid organic-inorganic perovskites have been the subject of recent intense interest due to advances in photovoltaic and other optoelectronic applications. However, their poor stability limits commercial market application. We enhance water stability by post treatment preparation of hybrid metal halide perovskite nanocrystal-embedded polymethylmethacrylate (PMMA) blend films. Through blending process without any cleaning of nanocrystals, crystalline hybrid organic-inorganic perovskite nanocrystals were incorporated into PMMA matrix with well-dispersion. Passivation of PMMA on the surface of the perovskite nanocrystals results in decreased traps and a long photoluminescence (PL) lifetime despite the bromine vacancies in the crystal lattice. Moreover, such color purity and inherent high transmittance for fluorescence emission of perovskite nanocrystals will endow the films with promising potentials in diverse practice photonic applications.
Key words： perovskite stability; polymer blends; perovskite blends fluorescence; polymethylmethacrylate (PMMA)
CLD number： TQ31Document code： A
Article ID： 1674-8042（2017）02-0103-07 doi： 10.3969/j.issn.1674-8042-2017-02-001
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后处理法制备提高有机无机杂化钙钛矿稳定性的聚甲基丙烯酸甲酯共混材料
李晓1， 薛振杰2， 王靖2， 黄川辉2， 刘立志2，乔学志2， 刘聪2， 宋倩2， 李迎春1
（1. 中北大学 材料科学与工程学院， 山西 太原 030051； 2. 中国科学院化学研究所 北京分子科学国家实验室 活体分析重点实验室， 北京 100090）
摘要： 有机无机杂化钙钛矿材料由于在光伏领域优异的性能成为了最近的研究热点， 但是这一材料遇水分解稳定性差限制了材料的实际应用。 我们通过后处理的方式将有机无机杂化钙钛矿材料嵌入到聚合物中， 增强了钙钛矿材料的水稳定性。 通过共混的方式， 无需清洗纳米颗粒， 即可获得钙钛矿良好分散性。 尽管这一共混材料中钙钛矿表面存在溴空位， 但是聚甲基丙烯酸甲酯的加入钝化了钙钛矿的表面， 使得钙钛矿减少了缺陷， 增加了荧光寿命。 同时， 这一共混材料良好的颜色纯度和聚甲基丙烯酸甲酯本身具有的良好透过率， 为钙钛矿应用到实际的光子器件中提供了可能。
关键词： 钙钛矿稳定性； 聚合物共混； 钙钛矿共混物荧光； 聚甲基丙烯酸甲酯
引用格式：LI Xiao, XUE Zhen-jie, WANG Jing, et al. Post treatment preparation of hybrid metal halide perovskite nanocrystal-embedded polymethylmethacrylate blends with enhanced stablity. Journal of Measurement Science and Instrumentation, 2017, 8(2)： 103-109. ［doi： 10.3969／j.issn.1674-8042.2017-02-001］
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