光探测
响应度
材料科学
钙钛矿(结构)
光电子学
光电探测器
紫外线
带隙
暗电流
Crystal(编程语言)
光学
化学
计算机科学
物理
结晶学
程序设计语言
作者
Pengbin Gui,Hai Zhou,Fang Yao,Zehao Song,Borui Li,Guojia Fang
出处
期刊:Small
[Wiley]
日期:2019-08-13
卷期号:15 (39)
被引量:75
标识
DOI:10.1002/smll.201902618
摘要
Perovskite photodetectors (PDs) with tunable detection wavelength have attracted extensive attention due to the potential application in the field of imaging, machine vision, and artificial intelligence. Most of the perovskite PDs focus on I- or Br-based materials due to their easy preparation techniques. However, their main photodetection capacity is situated in the visible region because of their narrower bandgap. Cl-based wide bandgap perovskites, such as CsPbCl3 , are scarcely reported because of the bad film quality of the spin-coated Cl-based perovskite, due to the poor solubility of the precursor. Therefore, ultraviolet detection using high-quality full inorganic perovskite films, especially with high thermal stability of materials and devices, is still a big challenge. In this work, high-quality single crystal CsPbCl3 microplatelets (MPs) synthesized by a simple space-confined growth method at low temperature for near-ultraviolet (NUV) PDs are reported. The single CsPbCl3 MP PDs demonstrate a decent response to NUV light with a high on/off ratio of 5.6 × 103 and a responsivity of 0.45 A W-1 at 5 V. In addition, the dark current is as low as pA level, leading to detectivity up to 1011 Jones. Moreover, PDs possess good stability and repeatability.
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