An ultrasensitive self-driven broadband photodetector based on a 2D-WS₂/GaAs type-II Zener heterojunction

Abstract

A self-driven photodetector based on WS2/GaAs type-II Zener heterojunction is fabricated, which shows a broadband response spectrum from 200 to 1550 nm beyond the limitation of the bandgaps with a high responsivity and specific detectivity.

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