Chip-integrated van der Waals PN heterojunction photodetector with low dark current and high responsivity.

ABSTRACT: Two-dimensional materials are attractive for constructing high-performance photonic chip-integrated photodetectors because of their remarkable electronic and optical properties and dangling-bond-free surfaces. However, the reported chip-integrated two-dimensional material photodetectors were mainly implemented with the configuration of metal-semiconductor-metal, suffering from high dark currents and low responsivities at high operation speed. Here, we report a van der Waals PN heterojunction photodetector, composed of p-type black phosphorous and n-type molybdenum telluride, integrated on a silicon nitride waveguide. The built-in electric field of the PN heterojunction significantly suppresses the dark current and improves the responsivity. Under a bias of 1 V pointing from n-type molybden

SUBMITTER: Tian R 

PROVIDER: S-EPMC9021258 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature