具有宽带-窄带双功能探测模式的光电探测器OA北大核心CSTPCD

Currently,photodetectors with broadband-narrowband dual-mode detection modes are popular in special applications.Traditional photodetectors with dual-mode detection modes are achieved by adding different filters to the broadband photodetectors.However,complex optical components increase the manufacturing cost of photodetec-tors and the complexity of device integration.Based on the above problems,we prepared MAPbCl3/MAPbBr3 perovskite single crystal heterojunction through a simple solution hot pressing method,and built a photodetector with adjustable detection band based on the single crystal heterostructure.When the incident light is incident from the side of the MAPbCl3 single crystal,the device shows high responsivity(∼0.05 A·W-1)and high spectral suppression ratio(∼55)only to the visible part(400-600 nm),and its rise time and decay time are 4.1 μs and 620 μs.When the light is incident from the side of the MAPbBr3 single crystal,the device has an obvious and continuous light response to the ultraviolet-visible part(300-600 nm).Therefore,our proposed solution hot pressing method and single-crystal heterostructure provide an effective solution for the preparation of high-performance photodetectors with tunable de-tection wavelengths.