Research and Characteristic Analysis of PIN Based on Simulation

This research, based on Silvaco software, aims to investigate the operational characteristics of PIN photodetectors under different lighting conditions, in particular the current response in both dark and illuminated states. The behaviour of the PIN photodetector under reverse bias is simulated, with particular emphasis on the effect of the optical wavelength on the device response. The development history of the PIN photodetector is first reviewed, followed by a detailed analysis of its basic operating principles. Using Tonyplot simulations, the current response of the PIN photodetector under various reverse bias voltages is examined, with particular emphasis on its high-impedance characteristics in the dark state. Further experiments show that the PIN detector has the best photoelectric conversion efficiency and the strongest response in the green light wavelength range around 0.5m. Finally, the distribution of electric potential and field inside the device confirms the accuracy and efficiency of the PIN detector's operating mechanism, where light excitation generates charge carriers. This provides a theoretical basis and data support for the operation of the PIN photodetector within a specific wavelength range.