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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

Optimization schemes for efficient multiple exciton generation and extraction in colloidal quantum dots

Author

  • Fikeraddis A. Damtie
  • Khadga J. Karki
  • Tönu Pullerits
  • Andreas Wacker

Summary, in English

Multiple exciton generation (MEG) is a process in which more than one electron hole pair is generated per absorbed photon. It allows us to increase the efficiency of solar energy harvesting. Experimental studies have shown the multiple exciton generation yield of 1.2 in isolated colloidal quantum dots. However real photoelectric devices require the extraction of electron hole pairs to electric contacts. We provide a systematic study of the corresponding quantum coherent processes including extraction and injection and show that a proper design of extraction and injection rates enhances the yield significantly up to values around 1.6.

Department/s

  • NanoLund: Center for Nanoscience
  • Mathematical Physics
  • Chemical Physics

Publishing year

2016-08-14

Language

English

Publication/Series

Journal of Chemical Physics

Volume

145

Issue

6

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 0021-9606