Ultrasmall SnS₂ quantum dot-based photodetectors with high responsivity and detectivity.

ABSTRACT: Quantum dots (QDs) often exhibit unique behaviors because the reduction in lateral size leads to stronger quantum confinement effects and a higher surface-to-volume ratio in comparison with larger two-dimensional nanosheets. However, the preparation of homogeneous QDs remains a longstanding challenge. This work reports the preparation of high-yield and ultrasmall tin disulfide (SnS₂) QDs by combining top-down and bottom-up approaches. The as-prepared SnS₂ QDs have a uniform lateral size of 3.17 ± 0.62 nm and a thicknesses 2.39 ± 0.88 nm. A series of self-powered photoelectrochemical-type photodetectors (PDs) utilizing the SnS₂ QDs as photoelectrodes are also constructed. Taking advantage of the tunable bandgaps and high carrier mobility of the SnS₂

SUBMITTER: Ren Y 

PROVIDER: S-EPMC11502062 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature