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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

Quantum dot photodegradation due to CdSe-ZnO charge transfer: Transient absorption study

Author

  • Karel Zidek
  • Kaibo Zheng
  • Pavel Chabera
  • Mohamed Qenawy
  • Tönu Pullerits

Summary, in English

We study changes in ultrafast transient absorption due to photodegradation of quantum dots attached to ZnO nanowire. The time-resolved measurements reveal impact of photodegradation on three distinct kinetic components present in transient absorption tau similar to 7 ps, 80 ps, and 7.5 ns). In addition, we observe superlinear dependence of photodegradation rate on concentration of excited electrons. The data are used to evaluate the mean electron back-recombination time of similar to 1 mu s. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729382]

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience

Publishing year

2012

Language

English

Publication/Series

Applied Physics Letters

Volume

100

Issue

24

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0003-6951