Fluorescent nanocrystal quantum dots (QDs) offer a wide range of fluorescing capabilities as emitters in molecular probes, biolabels, solid-state lighting, and quantum informatics. Currently, the best studied and highest performing QD systems are cadmium based. Yet because of cadmium’s inherent toxicity, they cannot be used in many biological and industrial applications. Indium, with its low toxicity, offers an alternative QD system that also exhibits size-tunable fluorescent emission throughout the visible and lower IR spectrum. Despite substantial synthetic efforts, indium-based QDs still exhibit significantly lower photostability and size tunability when compared to their higher-toxicity counterparts. Growing thick shells of a wider-band gap material, such as ZnSe or ZnS, over InP QDs has been shown to passivate surface trap sites and increase their photostability. Here for the first time we show control over indium doping into the ZnSe shell and provide an unprecedented view into the effects of interface doping on the photophysical properties of individual nanocrystals.<br/>

Effects of alloying on exciton recombination in InP-ZnSe quantum dots

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.