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 language | English (US) |
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Pages (from-to) | 1094-1098 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry Letters |
Volume | 3 |
Issue number | 9 |
DOIs | |
State | Published - May 3 2012 |
ASJC Scopus subject areas
- General Materials Science
- Physical and Theoretical Chemistry