Mr. Shiwei Xue Profile

Shiwei Xue

at Shanghai Institute of Technical Physics

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Proceedings Article | 13 April 2015 Paper

Simulation for spectral response of solar-blind AlGaN based p-i-n photodiodes

Shiwei Xue, Jintong Xu, Xiangyang Li

Proceedings Volume 9522, 95221N (2015) https://doi.org/10.1117/12.2180105

KEYWORDS: Polarization, Gallium nitride, Sensors, PIN photodiodes, Aluminum, Instrument modeling, Aluminum nitride, Device simulation, Ultraviolet radiation, Absorption

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In this article, we introduced how to build a physical model of refer to the device structure and parameters. Simulations for solar-blind AlGaN based p-i-n photodiodes spectral characteristics were conducted in use of Silvaco TCAD, where device structure and parameters are comprehensively considered. In simulation, the effects of polarization, Urbach tail, mobility, saturated velocities and lifetime in AlGaN device was considered. Especially, we focused on how the concentration-dependent Shockley-Read-Hall (SRH) recombination model affects simulation results. By simulating, we analyzed the effects in spectral response caused by TAUN0 and TAUP0, and got the values of TAUN0 and TAUP0 which can bring a result coincides with test results. After that, we changed their values and made the simulation results especially the part under 255 nm performed better. In conclusion, the spectral response between 200 nm and 320 nm of solar-blind AlGaN based p-i-n photodiodes were simulated and compared with test results. We also found that TAUN0 and TAUP0 have a large impact on spectral response of AlGaN material.

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