A Broadband Photodetector Based on Non-Layered MnS/WSe₂ Type-I Heterojunctions with Ultrahigh Photoresponsivity and Fast Photoresponse.

ABSTRACT: The separation of photogenerated electron-hole pairs is crucial for the construction of high-performance and wide-band responsive photodetectors. The type-I heterojunction as a photodetector is seldomly studied due to its limited separation of the carriers and narrow optical response. In this work, we demonstrated that the high performance of type-I heterojunction as a broadband photodetector can be obtained by rational design of the band alignment and proper modulation from external electric field. The heterojunction device is fabricated by vertical stacking of non-layered MnS and WSe₂ flakes. Its type-I band structure is confirmed by the first-principles calculations. The MnS/WSe₂ heterojunction presents a wide optical detecting range spanning from 365 nm to 1550 nm

SUBMITTER: Xie C 

PROVIDER: S-EPMC11012445 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature