钙钛矿(结构)
材料科学
光电探测器
结晶度
光电效应
光电子学
卤化物
碘化物
半导体
离子键合
异质结
量子效率
光伏
载流子
化学工程
离子
无机化学
化学
光伏系统
复合材料
有机化学
工程类
生态学
生物
作者
Yanyan Peng,Dayong Jiang,Man Zhao
摘要
Photodetectors (PDs) that combine inorganic semiconductors with organic lead halide perovskites to produce broader spectral responses have captured great interest from researchers; however, the imperfect perovskite crystallinity and the defects on the film surface are still the main factors inhibiting the PD's capability. Here, we proposed a simple method by introducing ionic liquid [1-butyl-3-methylimidazolium iodide (BMII)] into ZnO/CH3NH3PbI3 to encourage the growth of perovskite grains, raise the crystallinity of perovskite, and reduce the trap states, finally enhancing the photoelectric performances. After the addition of BMII, there are 171-fold, 74-fold, and 76-fold increases, respectively, in the light–dark current ratio, the spectral responsivity, and the external quantum efficiency, meanwhile, detectivity can reach 2.58 × 1013 Jones in the UV–vis range. The impressive results can be owed to the higher carrier concentration of ZnO/CH3NH3PbI3 with BMII, which can facilitate the charge transfer and suppress the recombination of photogenerated carriers. This study may be of assistance to extend our knowledge of developing high-performance PDs.
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