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Medium Bandgap Conjugated Polymer for High Performance Polymer Solar Cells Exceeding 9% Power Conversion Efficiency
Author(s) -
Jung Jae Woong,
Liu Feng,
Russell Thomas P.,
Jo Won Ho
Publication year - 2015
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.201503902
Subject(s) - materials science , energy conversion efficiency , polymer , polymer solar cell , conjugated system , thiophene , crystallinity , band gap , hybrid solar cell , photovoltaic system , optoelectronics , solar cell , homo/lumo , chemical engineering , organic chemistry , composite material , molecule , engineering , ecology , biology , chemistry
Two medium‐bandgap polymers composed of benzo[1,2‐ b :4,5‐ b ′]dithiohpene and 2,1,3‐benzothiadiazole with 6‐octyl‐thieno[3,2‐b]thiophene as a π‐bridge unit are synthesized and their photovoltaic properties are analyzed. The two polymers have deep highest occupied molecular orbital energy levels, high crystallinity, optimal bulk‐heterojunction morphology, and efficient charge transport, resulting in a power conversion efficiency of as high as 9.44% for a single‐junction polymer solar‐cell device.