High-performance ultraviolet photodetectors based on ZnO/Au/ZnO sandwich structure. (10th June 2015)

• Record Type: Journal Article
• Authors: Jiang, Dayong; Liu, Rusheng; Zhang, Qingchao; Li, Rui; Duan, Qian; Qin, Jieming; Shen, Xiande; Hou, Jianhua; Zhao, Jianxun; Liang, Qingcheng; Gao, Shang
• Is Part Of: Journal of physics. Volume 48:Number 27(2015)
• Publication Date: 2015-06-10
• Subjects: sandwich structure -- ultraviolet photodetectors -- high responsivity -- low dark current; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/48/27/275104
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: We developed sandwich ultraviolet photodetectors by a radio frequency magnetron sputtering method. As expected, the performances of the optimized ZnO/Au/ZnO sandwich photodetectors are much better than that of a metal-semiconductor-metal structure through combing high responsivity (enlarged ~60 times) and low dark current (reduced by more than two orders of magnitudes). To investigate the above phenomena, simulations of electric-field intensity distribution in the two structured photodetectors were performed using the ANSYS software. A proposed physical mechanism is used to explain the above results, which agree well with the simulations.