文摘
The zero-drift phenomenon of the I–V (current–voltage characteristics) of the quantum effect photodetector and the variation of zero-drift voltage are researched in the paper. The photovoltaic quantum dots infrared photodetector (QDIP) has the photocurrent zero-drift and the dark current oscillation. It has proved by simulated that related to the InAs QDs layer number. The photoconductive QDIP has a zero-drift that related to sweep voltage with time delay. With the time delay decreasing, the zero-drift voltage increases. When time delay is fixed, zero-drift voltage decreases at the illumination. In addition, the photodetector capacitance may be calculated by zero-drift voltage formula.