Lifetime variation in giant nonblinking QDs due to switching between neutral and negatively charged states

摘要

Quantum dots (QDs) are attractive as nanoscale light sources, but the fluctuations in emission intensity from individual dots, which is known as "blinking," can limit their application. It has recently been shown that CdS/ CdSe core-shell nanoparticles with thick shells do not exhibit blinking. However, as reported by a Los Alamos team, Chris-tophe Galland (now at the University of Delaware), Yagnaseni Ghosh, Andrea Steinbriick, Jennifer A. Hollingsworth, Han Htoon, and Victor I. Klimov in the June 19 issue of Nature Communications (DOI: 10.1038commsl916), giant nonblinking QDs (g-QDs) exhibit a pronounced variation in their emission lifetimes due to a switching between negatively charged and neutral states.