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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.
As a new type of semiconductor material, organometallic perhalide perovskite (CH3NH3Pb X3) attracts a great deal of attention in the field of photovoltaics.At the same time, the photoluminescence possessed by organometallic halophilic perovskites and the higher fluorescence quantum yield So it is possible to study the luminescence of organic perovskite.The study on the electroluminescence behavior of organometallic perovskite has great significance for the further application in the field of optoelectronics.Brithium perovskite (CH3NH3Pb Br3) has good photoluminescence properties, Has high fluorescence quantum yield and good stability in the air.In this paper, CH3NH3Pb Br3 was selected as the light-emitting layer, and a high-quality CH3NH3Pb Br3 thin film was obtained by gas-assisted method and a light-emitting diode was successfully constructed.Based on CH3NH3Pb The electroluminescence of Br3 LED is green at 536 nm, the luminescence brightness reaches 1000 cd m-2, and the external quantum efficiency is 0.1% .This study is of great benefit to explore the electroluminescence behavior of organometallic perovskite, meanwhile, It also broadens the potential of organo-metal perhalide perovskites in optoelectronics applications.