Colloidal CuInSe2 nanocrystals in the quantum confinement regime: Synthesis, optical properties, and electroluminescence

Haizheng Zhong, Zhibin Wang, Enrico Bovero, Zhenghong Lu, Frank C.J.M. Van Veggel, Gregory D. Scholes

Research output: Contribution to journalArticle

152 Scopus citations

Abstract

Photoluminescent, near-stoichiometric colloidal CuInSe2 nanocrystals are synthesized in large batches and with good colloidal quality. An organometallic method is used with a moderate reaction temperature (≤200 °C) to produce CuInSe2 nanocrystals with size-tunable photoluminescence spectra ranging from ∼600 to ∼850 nm. Two-dimensional photoluminescence excitation-emission maps are reported for the CuInSe 2 nanocrystals, highlighting the size-tunable excitonic features. Type I heterostructured CuInSe2/ZnS nanocrystals are prepared and purified. They are found to have absolute photoluminescence quantum yields up to ∼26%. The potential to use CuInSe2/ZnS core/shell nanocrystals as a potential low toxicity active layer in light-emitting diodes is demonstrated by fabricating electroluminescent devices.

Original languageEnglish (US)
Pages (from-to)12396-12402
Number of pages7
JournalJournal of Physical Chemistry C
Volume115
Issue number25
DOIs
StatePublished - Jun 30 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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