光电探测器
暗电流
钙钛矿(结构)
钝化
卤化物
光电子学
材料科学
异质结
量子点
纳米技术
化学
无机化学
图层(电子)
结晶学
作者
Xiaoxian Song,Fuguo Wang,Xuefang Liu,Hongwen Li,Haiting Zhang,WenBao Sun,Ze Xu,Dongdong Wei,Nan Cong,Jing Wang,Zijie Dai,Yunpeng Ren,Yunxia Ye,Xudong Ren,Jianquan Yao
标识
DOI:10.1016/j.optmat.2022.113407
摘要
Mixed halide inorganic perovskite CsPbI3-xBrx has attracted attention in the field of optoelectronics. As a desirable photoactive material, the application of CsPbI2Br in the field of photodetector (PD) remains to be explored. The synergistic passivation strategy based on Ag2S quantum dot (QD) aqueous solution improves the morphology of the CsPbI2Br perovskite film. At the same time, Ag2S/CsPbI2Br bulk heterojunction optimizes the energy level arrangement between perovskite and Au electrode, improves the carrier transmission and collection capacity, and thus improves the performance of PD. Ag2S/CsPbI2Br bulk heterojunction PD has an ultra-low dark current of 7.74 pA, an ultra-fast response speed of 2.95/3.07 μs, and a high switching ratio of 7.67 × 105. This work provides a method for the preparation of high-quality mixed halide perovskite materials and a strategy for the development of high-performance perovskite PDs based on bulk heterojunction.
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