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

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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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Indium sulfide
Indium
Sulfides
Nanoparticles
Nanocrystals
Copper
Photoluminescence
Optical transitions
Quantum efficiency
Electron energy levels
Monolayers
Electrons
Infrared radiation
Defects

ASJC Scopus subject areas

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

Cite this

Efficient synthesis of highly luminescent copper indium sulfide-based core/shell nanocrystals with surprisingly long-lived emission. / Li, Liang; Pandey, Anshu; Werder, Donald J.; Khanal, Bishnu P.; Pietryga, Jeffrey M.; Klimov, Victor I.

In: Journal of the American Chemical Society, Vol. 133, No. 5, 09.02.2011, p. 1176-1179.

Research output: Contribution to journalArticle

Li, Liang ; Pandey, Anshu ; Werder, Donald J. ; Khanal, Bishnu P. ; Pietryga, Jeffrey M. ; Klimov, Victor I. / Efficient synthesis of highly luminescent copper indium sulfide-based core/shell nanocrystals with surprisingly long-lived emission. In: Journal of the American Chemical Society. 2011 ; Vol. 133, No. 5. pp. 1176-1179.
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