Infrared-active heterostructured nanocrystals with ultralong carrier lifetimes

Doh C. Lee, István Robel, Jeffrey M. Pietryga, Victor I Klimov

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

We present the synthesis of composite PbSe/CdSe/CdS nanocrystals with two distinct geometries: core/shell/shell structures and tetrapods. These novel nanostructures exhibit extremely long carrier decay times up to 20 μs that are combined with high emission efficiencies in the infrared. The increase in carrier lifetimes is attributed to the reduction of the electron-hole overlap as a result of delocalization of the electron wave function into the outer CdS shell or arms. The ultralong carrier lifetimes and controlled geometry render these nanocrystals attractive for a variety of applications from lasing to photocatalysis and photovoltaics.

Original languageEnglish
Pages (from-to)9960-9962
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number29
DOIs
Publication statusPublished - Jul 28 2010

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Carrier lifetime
Nanoparticles
Nanocrystals
Electrons
Infrared radiation
Geometry
Nanostructures
Photocatalysis
Wave functions
Composite materials
lead selenide

ASJC Scopus subject areas

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

Cite this

Infrared-active heterostructured nanocrystals with ultralong carrier lifetimes. / Lee, Doh C.; Robel, István; Pietryga, Jeffrey M.; Klimov, Victor I.

In: Journal of the American Chemical Society, Vol. 132, No. 29, 28.07.2010, p. 9960-9962.

Research output: Contribution to journalArticle

Lee, Doh C. ; Robel, István ; Pietryga, Jeffrey M. ; Klimov, Victor I. / Infrared-active heterostructured nanocrystals with ultralong carrier lifetimes. In: Journal of the American Chemical Society. 2010 ; Vol. 132, No. 29. pp. 9960-9962.
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