Effects of lattice strain and band offset on electron transfer rates in type-II nanorod heterostructures

Hunter McDaniel, Matthew Pelton, Nuri Oh, Moonsub Shim

Research output: Contribution to journalArticlepeer-review

Abstract

Type-II nanorod heterostructures (NRHs) exhibit efficient directional charge separation and provide the potential to control this flow of charges through changes in structure and composition. We use transient-absorption spectroscopy to investigate how the magnitude of band offset and lattice strain alters dynamics of photogenerated electrons in CdSe/CdTe type-II NRHs. In the absence of alloying and strain effects, electron transfer occurs in ∼300 fs. Reducing the conduction band offset by means of alloying leads to an even shorter charge-separation time (<200 fs), whereas curved NRHs with pronounced strain exhibit a longer charge-separation time of ∼700 fs.

Original languageEnglish (US)
Pages (from-to)1094-1098
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume3
Issue number9
DOIs
StatePublished - May 3 2012

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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