光学学报, 2019, 39 (10): 1016002, 网络出版: 2019-10-09   

混合阳离子钙钛矿的高效率绿色发光器件 下载: 1538次

Highly Efficient Green-Emitting Devices Based on Mixed-Cation Perovskites
作者单位
1 西南大学物理科学与技术学院, 重庆 400715
2 中国工程物理研究院流体物理研究所, 四川 绵阳 621900
摘要
有机-无机金属卤化物钙钛矿材料具有可溶液加工性、良好色纯度和发光波长易调节等优点,易于制备低成本高分辨率的发光显示器件。研究了包含甲基胺(MA +)和乙基胺(EA +)的混合阳离子钙钛矿材料,其发光波长可以通过改变MA +和EA +的比例进行调节。混合EA +可以显著降低材料缺陷态密度,提高发光量子产率和光稳定性。采用该材料制备的绿光器件的最大外量子效率为7.7%,功率效率为25.1 lm·W -1,分别为MAPbBr3器件的1.9倍和1.7倍,器件稳定性有一定程度的提高。
Abstract
Organic-inorganic lead halide perovskites are intensively studied for their large potential in low-cost and high-resolution light-emitting devices due to the advantages of solution-processability, good color purity, and facile emission wavelength tunability. We study the perovskite materials containing a mixture of methylammonium (MA +) and ethylammonium cations (EA +), which show the cation-ratio dependent emission wavelength. Introduction of EA + cations increases the photoluminescence quantum yield and photo-stability simultaneously, reduces the density of defect states significantly. Related green-emitting devices show a maximum external quantum efficiency and power efficiency of 7.7% and 25.1 lm·W -1, which are 1.9 and 1.7 times as those of the MAPbBr3-based analogs, respectively, along with improved operational stability.

杨晓晖, 王琦, 肖择武, 吴小龑, 任杰, 吴燕婷. 混合阳离子钙钛矿的高效率绿色发光器件[J]. 光学学报, 2019, 39(10): 1016002. Xiaohui Yang, Qi Wang, Zewu Xiao, Xiaoyan Wu, Jie Ren, Yanting Wu. Highly Efficient Green-Emitting Devices Based on Mixed-Cation Perovskites[J]. Acta Optica Sinica, 2019, 39(10): 1016002.

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