Photocarrier drift distance in organic solar cells and photodetectors

Stolterfoht, Martin, Armin, Ardalan, Philippa, Bronson, White, Ronald D., Burn, Paul L., Meredith, Paul, Juška, Gytis and Pivrikas, Almantas (2015) Photocarrier drift distance in organic solar cells and photodetectors. Scientific Reports, 5 9949.1-9949.7. doi:10.1038/srep09949


Author Stolterfoht, Martin
Armin, Ardalan
Philippa, Bronson
White, Ronald D.
Burn, Paul L.
Meredith, Paul
Juška, Gytis
Pivrikas, Almantas
Title Photocarrier drift distance in organic solar cells and photodetectors
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2015-04-01
Year available 2015
Sub-type Article (original research)
DOI 10.1038/srep09949
Open Access Status DOI
Volume 5
Start page 9949.1
End page 9949.7
Total pages 7
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Subject 1000 General
Abstract Light harvesting systems based upon disordered materials are not only widespread in nature, but are also increasingly prevalent in solar cells and photodetectors. Examples include organic semiconductors, which typically possess low charge carrier mobilities and Langevin-type recombination dynamics - both of which negatively impact the device performance. It is accepted wisdom that the â €œ drift distanceâ €(i.e., the distance a photocarrier drifts before recombination) is defined by the mobility-lifetime product in solar cells. We demonstrate that this traditional figure of merit is inadequate for describing the charge transport physics of organic light harvesting systems. It is experimentally shown that the onset of the photocarrier recombination is determined by the electrode charge and we propose the mobility-recombination coefficient product as an alternative figure of merit. The implications of these findings are relevant to a wide range of light harvesting systems and will necessitate a rethink of the critical parameters of charge transport.
Keyword Multidisciplinary Sciences
Science & Technology - Other Topics
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID ARC DECRA DE120102271
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2016 Collection
School of Chemistry and Molecular Biosciences
 
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Created: Fri, 08 May 2015, 20:24:44 EST by Mrs Louise Nimwegen on behalf of School of Chemistry & Molecular Biosciences