Luminescence Change of CdS and CdSe Quantum Dots on a Ag Film.

ABSTRACT: Enhanced luminescence of an emitter on a Ag film is usually ascribed to the resonant surface plasmons. In these studies, the solid cadmium sulfide (CdS) and cadmium selenide (CdSe) quantum dot/silver (QD/Ag) hybrids were prepared, and the luminescence characteristics of these QD/Ag hybrids were measured. It is found that the enhancement of the trap state emission (TSE) is related to the QD size. The TSE features of the annealed QD/Ag hybrids are insensitive to the morphology of the Ag film. We used the wet and dry methods to separate the QD and Ag components and found that the photoluminescence (PL) of the QD component was permanently changed from the initial state. The PL modification is ascribed to the Ag⁺ doping effect rather than the surface plasmons. This doping method uses

SUBMITTER: Hu L 

PROVIDER: S-EPMC6732985 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature