A mixed-dimensional quasi-1D BiSeI nanowire-2D GaSe nanosheet p-n heterojunction for fast response optoelectronic devices.

ABSTRACT: Due to the unique combination configuration and the formation of a built-in electric field, mixed-dimensional heterojunctions present fruitful possibilities for improving the optoelectronic performances of low-dimensional optoelectronic devices. However, the response times of most photodetectors built from mixed-dimensional heterojunctions are within the millisecond range, limiting their applications in fast response optoelectronic devices. Herein, a mixed-dimensional BiSeI/GaSe van der Waals heterostructure is designed, which exhibits visible light detection ability and competitive photoresponsivity of 750 A W^-1 and specific detectivity of 2.25 × 10¹² Jones under 520 nm laser excitation. Excitingly, the device displays a very fast response time, e.g., the rise

SUBMITTER: Hu H 

PROVIDER: S-EPMC10629003 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature