Highly luminescent nanocrystals from removal of impurity atoms residual from ion-exchange synthesis

Prashant K. Jain, Brandon J. Beberwyck, Lam Kiu Fong, Mark J. Polking, A. Paul Alivisatos

Research output: Contribution to journalArticle

Abstract

Pure crystals: Ion exchange of semiconductor nanocrystals yielded materials with poor optoelectronic properties such as low photoluminescence quantum yields. The reason for the low quantum yields of these nanocrystals are impurities at the level of a few atoms per nanocrystal. Cation-exchanged nanostructures, however, could be purified post exchange from such impurities resulting in high-quality nanocrystals (see picture).

Original languageEnglish (US)
Pages (from-to)2387-2390
Number of pages4
JournalAngewandte Chemie - International Edition
Volume51
Issue number10
DOIs
StatePublished - Mar 5 2012
Externally publishedYes

Keywords

  • copper
  • impurity removal
  • ion exchange
  • luminescence
  • nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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