Advanced Optical Materials
Black Phosphorous/Indium Selenide Photoconductive Detector for Visible and Near‐Infrared Light with High Sensitivity
Advanced Optical Materials · 7, 1900020 (2019)
Read original paper
Introduction
An InSe layer stacked on black phosphorus forms a vertical photodetector with a response from 405 to 1550 nm. The device responds on a roughly 22 ms timescale, while the InSe cap also limits environmental degradation of the black phosphorus.
A closer reading
The upper layer contributes to photogating as well as protecting black phosphorus. Its role is clearer when responsivity, response time and stability are considered together rather than judging the device by its best responsivity at one wavelength.