一种基于p-CuI/n-TiO异质结薄膜的具有高开/关比的透明自供电光电探测器。

A transparent, self-powered photodetector based on p-CuI/n-TiOheterojunction film with high on-off ratio.

作者信息

Zuo Chaolei, Cai Sa, Li Ziliang, Fang Xiaosheng

机构信息

Department of Materials Science, Fudan University, Shanghai 200433, People's Republic of China.

出版信息

Nanotechnology. 2021 Dec 16;33(10). doi: 10.1088/1361-6528/ac3e35.

DOI:10.1088/1361-6528/ac3e35

PMID:34844229

Abstract

Ultraviolet(UV) photodetectors(PDs) can monitor UV radiation, enabling it to be effective for many applications, such as communication, imaging and sensing. The rapid progress on portable and wearable optoelectronic devices places a great demand on self-powered PDs. However, high-performance self-powered PDs are still limited. Herein we display a transparent and self-powered PD based on a p-CuI/n-TiOheterojunction, which exhibits a high on-off ratio (10at 310 nm) and a fast response speed (rise time/decay time = 0.11 ms/0.72 ms) without bias. Moreover, the device shows an excellent UV-selective sensitivity as a solar-blind UV PD with a high UV/visible rejection ratio (/= 5.3 × 10), which can be ascribed to the wide bandgaps of CuI and TiO. This work provides a feasible route for the construction of transparent, self-powered PDs based on p-n heterojunctions.

摘要

紫外（UV）光电探测器（PDs）可以监测紫外线辐射，使其在许多应用中发挥作用，如通信、成像和传感。便携式和可穿戴光电器件的快速发展对自供电PDs提出了很高的要求。然而，高性能自供电PDs仍然有限。在此，我们展示了一种基于p-CuI/n-TiO异质结的透明自供电PD，它在无偏压情况下表现出高开关比（310nm处为10）和快速响应速度（上升时间/衰减时间=0.11ms/0.72ms）。此外，该器件作为日盲紫外PD表现出优异的紫外选择性灵敏度，具有高紫外/可见光抑制比（/=5.3×10），这可归因于CuI和TiO的宽带隙。这项工作为基于p-n异质结构建透明自供电PDs提供了一条可行的途径。