Core Nanoparticle Engineering for Narrower and More Intense Band-Edge Emission from AgInS₂/GaS_x Core/Shell Quantum Dots.

ABSTRACT: Highly luminescent silver indium sulfide (AgInS₂) nanoparticles were synthesized by dropwise injection of a sulfur precursor solution into a cationic metal precursor solution. The two-step reaction including the formation of silver sulfide (Ag₂S) nanoparticles as an intermediate and their conversion to AgInS₂ nanoparticles, occurred during the dropwise injection. The crystal structure of the AgInS₂ nanoparticles differed according to the temperature of the metal precursor solution. Specifically, the tetragonal crystal phase was obtained at 140 °C, and the orthorhombic crystal phase was obtained at 180 °C. Furthermore, when the AgInS₂ nanoparticles were coated with a gallium sulfide (GaS_x) shell, the nanoparticles with both c

SUBMITTER: Hoisang W 

PROVIDER: S-EPMC6955825 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature