纳米棒
光电探测器
异质结
材料科学
光电子学
微晶
暗电流
钙钛矿(结构)
紫外线
探测器
纳米技术
光学
化学
结晶学
物理
冶金
作者
Yupeng Zhang,Ya Zhai,H. Zhang,Zhaoxin Wang,Yongfeng Zhang,Ruiliang Xu,Shengping Ruan,Jingran Zhou
出处
期刊:Sensors
[MDPI AG]
日期:2023-07-27
卷期号:23 (15): 6726-6726
被引量:1
摘要
The application of TiO2 nanorods in the field of ultraviolet (UV) photodetectors is hindered by a high dark current, which is attributed to crystal surface defects and intrinsic excitation by carrier thermal diffusion. Here, a photodetector based on polycrystalline perovskite MAPbCl3/TiO2 nanorods heterojunctions has been fabricated to overcome the shortcoming. The structure was composed of horizontal MAPbCl3 polycrystalline and vertically aligned TiO2 nanorods array. Many localized depletion regions at the MAPbCl3/TiO2 interface can reduce the dark current. The TiO2/MAPbCl3 detector shows high performance including a high ratio of light-dark current of about six orders of magnitude, which is much larger than that of the TiO2 detector. This study indicates the potential in the TiO2/MAPbCl3 heterojunction to fabricate high-performance UV detectors.
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