期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 5, 期 47, 页码 12520-12528出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc04565d
关键词
-
资金
- National Natural Science Foundation of China [51672044, 51741203, 51472049, 51602049]
- Shanghai Pujiang Program [16PJ1400200]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT_16R13]
- China Postdoctoral Science Foundation [2017M610217]
- DHU Distinguished Young Professor Program
- Fundamental Research Funds for the Central Universities
A self-powered high-performance broadband photodetector was fabricated, based on n-Si(111)/p-NiO heterojunctions consisting of single-crystal NiO nanosheets, via a facile hydrothermal method. The device exhibited broadband detection capabilities (350-600 nm) and excellent self-powered performance, with an external quantum efficiency (EQE) as high as similar to 20% under zero bias. Under a low reverse bias of -0.2 V, the highest photosensitivity (photo-dark current ratio) values of 938% and 2249% were achieved under illumination from 350 nm and 600 nm light (0.5 mW cm(-2)), respectively, which was several orders of magnitude higher than for previously reported Si/NiO heterojunction photodetectors. Under a high reverse bias of -2 V, the excellent EQE of the device was found to be between 62.5% and 89.5% upon illumination from 350-600 nm light. In addition, the fast response speed of the as-fabricated device was less than 30 ms. The results indicate that n-Si(111)/p-NiO heterojunction photodetectors made of single-crystal NiO nanosheets have obvious advantages for application in high-performance and energy-saving optoelectronic devices.
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