期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 53, 期 29, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab86e5
关键词
epsilon-Ga2O3; Schottky contact; solar-blind photodetector; high detectivity
资金
- National Natural Science Foundation of China [61774019, 51572033, 51572241]
Owing to the constraint of carrier transport, the dark current is relatively lower in Schottky contacted devices than that in Ohmic contacted devices, leading to a high specific detectivity in photodetectors. In this work, we prepared epsilon-Ga2O3 thin film by using metal-organic chemical vapor deposition, then constructed a three-pair interdigital ultraviolet solar-blind photodetector with Au electrodes as Schottky contacts. Seen from the results, this photodetector displays an outstanding wavelength selectivity with responsivity of 0.52 A W-1 responding to 250 nm wavelength light. In addition, it shows a photo-to-dark current ratio of 1.82 x 10(4)/6.03 x 10(2) at 5 V under 40/5 mu W cm(-2) 254 nm light illuminations, respectively, and a low dark current of 1.87 x 10(-11) A. Correspondingly, the specific detectivity is 1.67 x 10(13)/4.45 x 10(12) Jones, and the photoresponsivity is 0.198 A W-1/52.54 mA W-1. Overall, epsilon-Ga2O3 prepared here is certified to be an excellent candidate material to perform high-performance solar-blind detection.
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