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Low‐Bandgap Alternating Fluorene Copolymer/Methanofullerene Heterojunctions in Efficient Near‐Infrared Polymer Solar Cells
Author(s) -
Zhang F.,
Mammo W.,
Andersson L. M.,
Admassie S.,
Andersson M. R.,
Inganäs O.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200600124
Subject(s) - materials science , copolymer , fluorene , polymer solar cell , band gap , polymer , energy conversion efficiency , active layer , optoelectronics , acceptor , infrared , organic solar cell , photochemistry , chemical engineering , polymer chemistry , layer (electronics) , nanotechnology , composite material , optics , thin film transistor , chemistry , physics , condensed matter physics , engineering
Efficient near‐IR polymer solar cells based on the low‐bandgap alternating fluorene copolymer APFO‐Green 5 (shown in the figure) exhibit a photoresponse up to 800 nm. The copolymer performs well in combination with the common electron acceptor [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM), reaching a power‐conversion efficiency of 2.2 % with a lower PCBM content in the active layer than previous devices based on low‐bandgap polymers.