光电探测器
光电子学
石墨烯
量子效率
材料科学
硅
异质结
光电效应
吸收(声学)
光学
纳米技术
物理
复合材料
作者
Jijie Zhao,Huan Liu,Lier Deng,Minyu Bai,Fei Xie,Shuai Wen,Weiguo Liu
出处
期刊:Sensors
[MDPI AG]
日期:2021-09-13
卷期号:21 (18): 6146-6146
被引量:9
摘要
Light loss is one of the main factors affecting the quantum efficiency of photodetectors. Many researchers have attempted to use various methods to improve the quantum efficiency of silicon-based photodetectors. Herein, we designed highly anti-reflective silicon nanometer truncated cone arrays (Si NTCAs) as a light-trapping layer in combination with graphene to construct a high-performance graphene/Si NTCAs photodetector. This heterojunction structure overcomes the weak light absorption and severe surface recombination in traditional silicon-based photodetectors. At the same time, graphene can be used both as a broad-spectrum absorption layer and as a transparent electrode to improve the response speed of heterojunction devices. Due to these two mechanisms, this photodetector had a high quantum efficiency of 97% at a wavelength of 780 nm and a short rise/fall time of 60/105µs. This device design promotes the development of silicon-based photodetectors and provides new possibilities for integrated photoelectric systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI