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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

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

Author

  • Karel Zidek
  • Kaibo Zheng
  • Carlito Ponseca
  • Maria Messing
  • Reine Wallenberg
  • Pavel Chabera
  • Mohamed Qenawy
  • Villy Sundström
  • Tönu Pullerits

Summary, in English

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.

Department/s

  • Chemical Physics
  • Solid State Physics
  • Centre for Analysis and Synthesis
  • NanoLund: Center for Nanoscience

Publishing year

2012

Language

English

Pages

12110-12117

Publication/Series

Journal of the American Chemical Society

Volume

134

Issue

29

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Condensed Matter Physics
  • Atom and Molecular Physics and Optics
  • Chemical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1520-5126