期刊
ACS APPLIED MATERIALS & INTERFACES
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c11681
关键词
perovskite; sandwich structure; self-powered; broad-spectra; photodetector
资金
- National Natural Science Foundation of China
- Talent Training Project of the Reform and Development Fund of Local Universities
- [12074095]
- [2020YQ02]
A simple sandwich structure photodetector is designed and fabricated, which exhibits enhanced detection performance in the UV and visible light regions. This photodetector shows high responsivities and self-powered response characteristics, providing a simple and effective method for the preparation of high-performance self-powered imaging photodetectors in the UV-visible region.
The UV-vis photodetector (PD), a detector that can simultaneously detect light in the ultraviolet region and the visible region, has a wide range of applications in military and civilian fields. Currently, it is very difficult to obtain good detection performance in the UV region (especially in the solar-blind range) like in the visible region with most UV-vis PDs. This severely affects the practical application of UV-vis broad-spectra PDs. Here, a simple sandwich structure PD (SSPD) composed of beta-Ga2O3, Au electrodes, and the MAPbBr3 perovskite is designed and fabricated to simultaneous enhance the detection performance in the UV and visible light regions. The beta-Ga2O3/Au/MAPbBr3 SSPD exhibits enhanced optoelectronic performance with high responsivities of 0.47 and 1.43 A W-1 at 240 and 520 nm under a bias of 6 voltage (V), respectively, which are 8.5 and 23 times than that of the metal-semiconductor- metal (MSM) structure MAPbBr3 PD at 6 V, respectively. The enhanced performance was attributed to the effective suppression of carrier recombination due to the efficient interface charge separation in the device structure. In addition, the self-powered response characteristic is also realized by forming a type-II heterojunction between beta-Ga2O3 and MAPbBr3, which gives the beta-Ga2O3/Au/MAPbBr3 SSPD superior single-pixel photo-imaging ability without an external power supply. This work provides a simple and effective method for the preparation of high-performance self-powered imaging PDs in the UV-visible region.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据