학술논문
Efficient Synthesis of Highly Luminescent Copper Indium Sulfide-Based Core/Shell Nanocrystals with Surprisingly Long-Lived Emission.
Document Type
Article
Author
Source
Subject
*BIOSYNTHESIS
*COPPER indium selenide
*NANOCRYSTALS
*PHOTOLUMINESCENCE
*SOLVENT wastes
*MONOMOLECULAR films
*INDUSTRIAL wastes
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Language
ISSN
0002-7863
Abstract
We report an efficient synthesis of copper indium sulfide nanocrystals with strong photoluminescence in the visible to near-infrared. This method can produce gram quantities of material with a chemical yield in excess of 90% with minimal solvent waste. The overgrowth of as-prepared nanocrystals with a few monolayers of CdS or ZnS increases the photoluminescence quantum efficiency to> 80%. On the basis of time-resolved spectroscopic studies of core/shell particles, we conclude that the emission is due to an optical transition that couples a quantized electron state to a localized hole state, which is most likely associated with an internal defect. [ABSTRACT FROM AUTHOR]