Ultrafast charge separation from highly reductive ZnTe/CdSe type II quantum dots

Shengye Jin, Jun Zhang, Richard D Schaller, Tijana Rajh, Gary P. Wiederrecht

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The low electron affinity of ZnTe quantum dots (QDs) makes it of interest for critically important photocatalytic processes. However, studies of charge transfer from such materials to adsorbates have not been reported. Here, the ultrafast internal and external charge separation dynamics in ZnTe/CdSe core/shell type II QDs have been studied through femtosecond transient absorption spectroscopy. The internal electron transfer time from a ZnTe core to a CdSe shell was found to be 0.67 ps, while the external electron transfer time from QDs to adsorbed molecules was found to be

Original languageEnglish
Pages (from-to)2052-2058
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume3
Issue number15
DOIs
Publication statusPublished - Aug 2 2012

Fingerprint

polarization (charge separation)
Semiconductor quantum dots
quantum dots
electron transfer
Electron affinity
Electrons
Adsorbates
electron affinity
Absorption spectroscopy
Charge transfer
absorption spectroscopy
charge transfer
Molecules
molecules

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Ultrafast charge separation from highly reductive ZnTe/CdSe type II quantum dots. / Jin, Shengye; Zhang, Jun; Schaller, Richard D; Rajh, Tijana; Wiederrecht, Gary P.

In: Journal of Physical Chemistry Letters, Vol. 3, No. 15, 02.08.2012, p. 2052-2058.

Research output: Contribution to journalArticle

Jin, Shengye ; Zhang, Jun ; Schaller, Richard D ; Rajh, Tijana ; Wiederrecht, Gary P. / Ultrafast charge separation from highly reductive ZnTe/CdSe type II quantum dots. In: Journal of Physical Chemistry Letters. 2012 ; Vol. 3, No. 15. pp. 2052-2058.
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