Efficient carrier multiplication in colloidal CuInSe2 nanocrystals

C. Jackson Stolle, Richard D. Schaller, Brian A. Korgel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Transient absorption spectroscopy (TAS) was used to study carrier multiplication (CM) (also called multiexciton generation (MEG)) in solvent-dispersed colloidal CuInSe2 nanocrystals with diameters as small as 4.5 nm. Size-dependent carrier cooling rates, absorption cross sections, and Auger lifetimes were also determined. The energy threshold for CM in the CuInSe2 nanocrystals was found to be 2.4 ± 0.2 times the nanocrystal energy gap (Eg) and the CM efficiency was 36 ± 6% per unit Eg. This is similar to other types of nanocrystal quantum dot materials.

Original languageEnglish (US)
Pages (from-to)3169-3174
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume5
Issue number18
DOIs
StatePublished - Sep 18 2014

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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