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Largely Enhanced Efficiency with a PFN/Al Bilayer Cathode in High Efficiency Bulk Heterojunction Photovoltaic Cells with a Low Bandgap Polycarbazole Donor
Author(s) -
He Zhicai,
Zhang Chen,
Xu Xiaofeng,
Zhang Lianjie,
Huang Liang,
Chen Junwu,
Wu Hongbin,
Cao Yong
Publication year - 2011
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.201101319
Subject(s) - cathode , materials science , bilayer , photovoltaic system , carbazole , optoelectronics , heterojunction , polymer , polymer solar cell , energy conversion efficiency , photochemistry , membrane , composite material , electrical engineering , chemistry , engineering , biochemistry
Quinoxaline‐containing poly(4,5‐ethylene‐2,7‐carbazole) (PECz‐DTQx ) shows a high efficiency of 6.07% in solar cells with a PFN/Al bilayer cathode. This is higher than the efficiency achieved with sole Al (3.99%) or with Ca/Al (4.52%) cathodes. A bilayer cathode could be valuable in device configurations to achieve high efficiency in combination with a high‐performance polymer donor.