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Planar Conjugated Polymers Containing 9,10‐Disubstituted Phenanthrene Units for Efficient Polymer Solar Cells
Author(s) -
Li Guangwu,
Kang Chong,
Li Cuihong,
Lu Zhen,
Zhang Jicheng,
Gong Xue,
Zhao Guangyao,
Dong Huanli,
Hu Wenping,
Bo Zhishan
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400044
Subject(s) - polymer solar cell , active layer , polymer , materials science , conjugated system , energy conversion efficiency , acceptor , fullerene , phenanthrene , chemical engineering , layer (electronics) , polymer chemistry , cathode , photochemistry , organic chemistry , nanotechnology , optoelectronics , chemistry , composite material , physics , condensed matter physics , engineering , thin film transistor
Four novel conjugated polymers ( P1‐4 ) with 9,10‐disubstituted phenanthrene (PhA) as the donor unit and 5,6‐bis(octyloxy)benzothiadiazole as the acceptor unit are synthesized and characterized. These polymers are of medium bandgaps (2.0 eV), low‐lying HOMO energy levels (below −5.3 eV), and high hole mobilities (in the range of 3.6 × 10 −3 to 0.02 cm 2 V −1 s −1 ). Bulk heterojunction (BHJ) polymer solar cells (PSCs) with P1‐4 :PC 71 BM blends as the active layer and an alcohol‐soluble fullerene derivative (FN‐C60) as the interfacial layer between the active layer and cathode give the best power conversion efficiency (PCE) of 4.24%, indicating that 9,10‐disubstituted PhA are potential donor materials for high‐efficiency BHJ PSCs.