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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

Effect of metal oxide morphology on electron injection from CdSe quantum dots to ZnO

Author

  • Kaibo Zheng
  • Karel Zidek
  • Mohamed Qenawy
  • Pavel Chabera
  • Mahmoud S. Abd El-Sadek
  • Tönu Pullerits

Summary, in English

Performance of quantum dot sensitized solar cells relies on a rapid electron injection from quantum dot to metal oxide. We studied the injection process in CdSe-ZnO system by ultrafast time-resolved absorption spectroscopy for two types of acceptor morphologies-nanowires and nanoparticles' films. Based on comparison between experimental data and Marcus theory, we demonstrate that the acceptor morphology has a significant impact on electron injection due to (i) change in material permittivity and (ii) different density of the band-edge states. The results open a reference to improve injection efficiency in quantum dot-metal oxide system by selection of the acceptor morphology. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4803173]

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience

Publishing year

2013

Language

English

Publication/Series

Applied Physics Letters

Volume

102

Issue

16

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