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Electron mobility of non-fullerene acceptors using a time of flight method

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Mica_2018_OE_Electronmobility_AAM.pdf (1.218Mb)
Date
01/12/2018
Author
Mica, Natalie A.
Thomson, Stuart A. J.
Samuel, Ifor D. W.
Keywords
Non-fullerene acceptor
Time of flight
Mobility
QC Physics
DAS
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Abstract
Organic solar cells are a promising renewable energy technology, offering the advantages of mechanical flexibility and solution processability. The charge carrier mobility is an important parameter as it influences the competition between charge extraction and recombination and therefore the cell efficiency. We report the electron mobility of two high performance non-fullerene acceptors ITIC and IDTBR in neat films and blended with their common donors. In a pure film ITIC has a zero-field electron mobility of 7.4 × 10−4 cm2/Vs, which dropped to 1.0 × 10−4 cm2/Vs when put into a blend with PTB7-Th or P3HT. The IDTBR:P3HT blend was found to have a slightly lower electron mobility of 5.6 × 10−5 cm2/Vs. The measured electron mobility is the same order of magnitude as the hole mobility in these blends, leading to balanced transport and efficient photovoltaic cells.
Citation
Mica , N A , Thomson , S A J & Samuel , I D W 2018 , ' Electron mobility of non-fullerene acceptors using a time of flight method ' , Organic Electronics , vol. In press . https://doi.org/10.1016/j.orgel.2018.08.027
Publication
Organic Electronics
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.orgel.2018.08.027
ISSN
1566-1199
Type
Journal article
Rights
© 2018 Elsevier B. V. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: 10.1016/j.orgel.2018.08.027
Description
Natalie A. Mica and Stuart A. J. Thompson acknowledge student funding from EPSRC. [grant nos. EP/L015110/1 and EP/G03673X/1] Ifor D. W. Samuel acknowledges support from a Royal Society Wolfson Research Merit award.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/18290

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