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Journal of Polymer Research
Published in: Journal of Polymer Research 4/2013

01-04-2013 | Original Paper

Synthesis and photovoltaic performance of a fluorene-bithiophene copolymer

Authors: Isabel R. Grova, Douglas J. Coutinho, Roberto M. Faria, Leni Akcelrud

Published in: Journal of Polymer Research | Issue 4/2013

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Abstract

We present the synthesis of a copolymer structure, poly(9,9′-n-di-hexyl-2,7-fluorene-alt-2,5-bithiophene), referred to herein as LaPPS43, and its physico-chemical characterization. Thin films of this polymer mixed with phenyl-C61-butyric acid methyl ester (PCBM) were used as the active layer in photovoltaic devices using the ITO/PEDOT:PSS/LaPPS43:PCBM/Ca/Al bulk heterojunction structure. The devices of different active layer thicknesses were electrically studied using J-V curves and the Photo-Celiv technique. The obtained results show that LaPPS43 combined with PCBM is a promising system for photovoltaic devices. Device performance is discussed in terms of the mean drift distance x for charge carriers. Photophysical data showed that the excitonic species are all localized in the aggregated forms. The mechanism of exciton formation and dissociation is also discussed.
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Metadata
Title
Synthesis and photovoltaic performance of a fluorene-bithiophene copolymer
Authors
Isabel R. Grova
Douglas J. Coutinho
Roberto M. Faria
Leni Akcelrud
Publication date
01-04-2013
Publisher
Springer Netherlands
Published in
Journal of Polymer Research / Issue 4/2013
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-013-0119-3

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