Electron Transfer in Quantum-Dot-Sensitized ZnO Nanowires: Ultrafast Time-Resolved Absorption and Terahertz Study

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Abstract

Photoinduced electron injection dynamics from CdSe quantum dots to ZnO nanowires is studied by transient absorption and time-resolved terahertz spectroscopy measurements. Ultrafast electron transfer from the CdSe quantum dots to ZnO is proven to be efficient already on a picoseconds time scale (tau = 3-12 ps). The measured kinetics was found to have a two-component character, whose origin is discussed in detail. The obtained results suggest that electrons are injected into ZnO via an intermediate charge transfer state.

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Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics
  • Atom and Molecular Physics and Optics
  • Chemical Sciences
Original languageEnglish
Pages (from-to)12110-12117
JournalJournal of the American Chemical Society
Volume134
Issue number29
Publication statusPublished - 2012
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060), Solid State Physics (011013006), Polymer and Materials Chemistry (LTH) (011001041)