Advantage of suppressed non-Langevin recombination in low mobility organic solar cells

Stolterfoht, Martin, Philippa, Bronson, Armin, Ardalan, Pandey, Ajay K., White, Ronald D., Burn, Paul L., Meredith, Paul and Pivrikas, Almantas (2014) Advantage of suppressed non-Langevin recombination in low mobility organic solar cells. Applied Physics Letters, 105 1: 013302-1-013302-5. doi:10.1063/1.4887316

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Author Stolterfoht, Martin
Philippa, Bronson
Armin, Ardalan
Pandey, Ajay K.
White, Ronald D.
Burn, Paul L.
Meredith, Paul
Pivrikas, Almantas
Title Advantage of suppressed non-Langevin recombination in low mobility organic solar cells
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2014-07-07
Year available 2014
Sub-type Article (original research)
DOI 10.1063/1.4887316
Open Access Status File (Publisher version)
Volume 105
Issue 1
Start page 013302-1
End page 013302-5
Total pages 5
Place of publication College Park, MD United States
Publisher American Institute of Physics
Collection year 2015
Language eng
Formatted abstract
Photovoltaic performance in relation to charge transport is studied in efficient (7.6%) organic solar cells (PTB7:PC71BM). Both electron and hole mobilities are experimentally measured in efficient solar cells using the resistance dependent photovoltage technique, while the inapplicability of classical techniques, such as space charge limited current and photogenerated charge extraction by linearly increasing voltage is discussed. Limits in the short-circuit current originate from optical losses, while charge transport is shown not to be a limiting process. Efficient charge extraction without recombination can be achieved with a mobility of charge carriers much lower than previously expected. The presence of dispersive transport with strongly distributed mobilities in high efficiency solar cells is demonstrated. Reduced non-Langevin recombination is shown to be beneficial for solar cells with imbalanced, low, and dispersive electron and hole mobilities.
Keyword Charge carrier mobility
Molecular weight
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
School of Chemistry and Molecular Biosciences
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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Created: Fri, 29 Aug 2014, 13:55:40 EST by Mrs Louise Nimwegen on behalf of School of Chemistry & Molecular Biosciences