Primary Modeling and Survey of 4H-SiC Based Metal-Semiconductor-Metal Ultraviolet Sensor with Novel Electrode Structure
4H-SiC based semicircular electrode metalsemiconductor-metal (SEMSM), triangular electrode MSM (TEMSM) and conventional electrode MSM (CEMSM) ultraviolet (UV) sensors have been modeled, investigated and characterized with numerical simulator ISE-DESSIS. By comparing with relevant experimental data, the model correctness is verified. The electrical and optical features of these sensors are simulated and calculated to character the effect of the novel electrode on performance enhancement. In contrast to CEMSM device, the SEMSM and TEMSM sensors show an outstanding superiority in terms of higher photocurrent, comparable low dark current and excellent quantum efficiency. At a bias of 30 V, the dark currents of SEMSM and TEMSM sensors are below 3.5 pA and the photocurrents are 20.7 nA and 23.7 nA under 310 nm UV illumination, respectively. Furthermore, the peak responsivity is estimated to be larger than 0.135 AAV, 0.156 AAV at 290 nm and maximum quantum efficiency at 280 nm is 58.8％ and 67.7％ for semicircular and triangular electrode structure, respectively.
MSM structure novel electrode UV photodetector electrical and optical characteristics
Chen bin Yang yin-tang Xie xuan-rong Wang ning
Key Laboratory of Ministry of education Wide Band-Gap Semiconductor Materials and Devices,Xidian Uni 771 Institute of Microelectronics Technology, Xian 710054
国际会议
三亚
英文
411-416
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）