High-performance photodetector based on semi-encompassed CH3NH3PbCl3–ZnO microwire heterojunction with alterable spectral response

光电探测器 异质结 材料科学 响应度 光电子学 卤化物 响应时间 半导体 计算机科学 无机化学 计算机图形学(图像) 化学
作者
Zhen Cheng,Kewei Liu,Baoshi Qiao,Jialin Yang,Xing Chen,Qiu Ai,Yongxue Zhu,Binghui Li,Lei Liu,Dezhen Shen
出处
期刊:Physica Scripta [IOP Publishing]
卷期号:98 (3): 035520-035520 被引量:1
标识
DOI:10.1088/1402-4896/acbbf9
摘要

Abstract Recently, heterojunctions consisting of hybrid organic-inorganic lead (Pb) halide perovskites and other semiconductors have drawn increasing attention for the potential application in photodetectors due to their exceptional performance. However, their performance is usually limited by the relatively low crystalline quality of perovskites, and the response spectra of the devices are difficult to adjust according to the practical requirement. Here, high quality CH 3 NH 3 PbCl 3 micro-sized crystals have been successfully fabricated on one side of individual ZnO microwire to form heterojunction photodetector by a two-step crystallization method. The heterojunction device presents a low dark current (60 nA at −6 V) along with a rapid response speed (rise time of <20 μ s and fall time of ∼500 μ s). More interestingly, the modulation of the response spectra and the responsivity can be realized by operating the device under front or back illumination due to the self-filtering properties. Our findings provide a promising method for combining perovskites with other inorganic materials to form high-performance heterojunction photodetectors.
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