Efficient synthesis of highly luminescent copper indium sulfide-based core/shell nanocrystals with surprisingly long-lived emission

Liang Li, Anshu Pandey, Donald J. Werder, Bishnu P. Khanal, Jeffrey M. Pietryga, Victor I. Klimov

Research output: Contribution to journalArticle

488 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1176-1179
Number of pages4
JournalJournal of the American Chemical Society
Volume133
Issue number5
DOIs
Publication statusPublished - Feb 9 2011

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ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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