Green light-emitting diode from bromine based organic-inorganic halide perovskite  

溴化钙钛矿绿色发光二极管（英文）

作　　者：覃翔 董焕丽 胡文平 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Science China Materials》2015年第3期186-191,共6页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(51222306,91222203,91233205 and 91433115);the China-Denmark Co-project(60911130231);TRR61(NSFC-DFG Transregio Project);the Ministry of Science and Technology of China(2011CB808405,2011CB932304,2013CB933403 and 2013CB933504);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB12030300)

摘　　要：Organic-inorganic halide perovskites have attracted considerable attention owing to their outstanding solar cell efficiency.Meanwhile,these halide perovskites exhibit good light emitting in visible and near-infrared range with high fluorescence quantum yield,resulting in electroluminescence.However,it remains challenging for lighting and display due to the low luminance and poor long-term stability.Herein,high performance green light-emitting diodes are fabricated from bromine based perovskite(CH3NH3Pb Br3) by systematically adjusting the preparation conditions and optimizing the emitting layer thickness.A high luminance up to 1500 cd m-2(one of the highest values for perovskites-based light-emitting diodes) was achieved with 80 nm perovskites-emitting layer,due to the well-crystallized,full-coverage property of the films.This result further confirms the great prospect of organic-inorganic perovskites in optoelectronics.有机金属卤化钙钛矿(CH3NH3Pb X3)作为一种新型的半导体材料在光伏领域引起了广泛的关注.同时,有机金属卤化钙钛矿所拥有的光致发光以及较高荧光量子产率为其电致发光提供了可能.因而,研究有机金属卤化钙钛矿的电致发光行为对于进一步拓展其在光电领域的应用具有重要意义.溴化钙钛矿(CH3NH3Pb Br3)具备良好的光致发光性能,具有较高的荧光量子产率,同时在空气中具有较好的稳定性.本文挑选CH3NH3Pb Br3作为发光层,借用气体辅助法得到了高质量的CH3NH3Pb Br3薄膜,并成功构建了发光二极管.基于CH3NH3Pb Br3的发光二极管电致发光为536 nm的绿光,发光亮度达到1000 cd m-2,外量子效率为0.1%.该研究对于探索有机金属卤化钙钛矿的电致发光行为大有裨益,同时也拓宽了有机金属卤化钙钛矿在光电领域的应用潜能.

关 键 词：发光二极管 NH 结型发光器件 LEDS Pb 钙钛矿 钛矿物 溴化 

分 类 号：TN312.8[电子电信—物理电子学] O627[理学—有机化学]