Bi₂ Te₃ /Bi₂ Se₃ /Bi₂ S₃ Cascade Heterostructure for Fast-Response and High-Photoresponsivity Photodetector and High-Efficiency Water Splitting with a Small Bias Voltage.

ABSTRACT: Large-scale multi-heterostructure and optimal band alignment are significantly challenging but vital for photoelectrochemical (PEC)-type photodetector and water splitting. Herein, the centimeter-scale bismuth chalcogenides-based cascade heterostructure is successfully synthesized by a sequential vapor phase deposition method. The multi-staggered band alignment of Bi₂ Te₃ /Bi₂ Se₃ /Bi₂ S₃ is optimized and verified by X-ray photoelectron spectroscopy. The PEC photodetectors based on these cascade heterostructures demonstrate the highest photoresponsivity (103 mA W^-1 at -0.1 V and 3.5 mAW^-1 at 0 V under 475 nm light excitation) among the previous reports based on two-dimensional materials and related heter

SUBMITTER: Lu C 

PROVIDER: S-EPMC9951346 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature