Ultrafast and Broadband Photodetection Based on Selenized AgSbS2 Thin Films Prepared by Spray Pyrolysis Deposition and Modified by Indium Nitrate

Broadband AgSbS 2 (Se) photodetectors are fabricated using spray pyrolysis with a post-selenization process. Indium nitrate is introduced to break the surface blockade to selenidation, largely enhancing the light response range and photocurrent.