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Enhanced Photovoltaic Performance of Low‐Bandgap Polymers with Deep LUMO Levels
Author(s) -
Zhou Huaxing,
Yang Liqiang,
Price Samuel C.,
Knight Kelly Jane,
You Wei
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201003357
Subject(s) - band gap , benzene , homo/lumo , polymer , acceptor , pyridine , unit (ring theory) , photovoltaic system , energy conversion efficiency , materials science , chemistry , optoelectronics , molecule , organic chemistry , physics , mathematics , electrical engineering , condensed matter physics , mathematics education , engineering
Mind the gap! Polymers synthesized by replacing the benzene unit in the acceptor 4,7‐dithien‐2‐yl‐2,1,3‐benzothiadiazole (DTBT) with a π‐electron‐deficient pyridine unit (DTPyT) show a smaller bandgap than their DTBT counterparts. Power conversion efficiencies of over 6 % are demonstrated in solar cell studies (see picture; PNDT, PQDT, and PBnDT represent dithiophene derivatives as weak donors).