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Nonfullerene Polymer Solar Cells with 8.5% Efficiency Enabled by a New Highly Twisted Electron Acceptor Dimer
Author(s) -
Hwang YeJin,
Li Haiyan,
Courtright Brett A. E.,
Subramaniyan Selvam,
Jenekhe Samson A.
Publication year - 2016
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.201503801
Subject(s) - materials science , arylene , acceptor , diimide , dimer , band gap , fullerene , optoelectronics , polymer , electron acceptor , organic solar cell , polymer solar cell , solar cell , nanotechnology , photochemistry , optics , condensed matter physics , organic chemistry , fluorescence , perylene , composite material , alkyl , chemistry , physics , aryl
Fullerene‐free and processing additive‐free 8.5% efficient polymer solar cells are achieved by using a new 3,4‐ethylenedioxythiophene‐linked arylene diimide dimer with a 76° twist angle. The devices combine high (78–83%) external quantum efficiency with high (0.91–0.95 V) photovoltages and thus have relatively low optical bandgap energy loss.