학술논문
Photoluminescence Stability Enhancement of Ag–In–Ga–S/GaSxCore/Shell Quantum Dots with Thicker Shells by the Addition of Gallium Diethyldithiocarbamate
Document Type
Article
Source
Chemistry Letters; November 2021, Vol. 50 Issue: 11 p1863-1866, 4p
Subject
Language
ISSN
03667022; 13480715
Abstract
A spectrally narrow band edge emission is generated in the green region from cadmium-free quantum dots comprised of silver indium gallium sulfide coated by gallium sulfide shells. The thickness of the gallium sulfide shell is increased by using gallium tris(diethyldithiocarbamate) as a supplementary precursor showing a strong adhesion with the quantum dot cores. Photoluminescence intensity and spectral shape of the core/shell quantum dots with the thicker shells are unchanged after 90 days.An introduction of gallium diethyldithiocarbamate as a supplementary precursor for the synthesis of gallium sulfide shells increases the thickness of coatings. The stablility of green emission from silver indium gallium sulfide/gallium sulfide core/shell quantum dots is significantly improved.