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Asymmetrical Ladder‐Type Donor‐Induced Polar Small Molecule Acceptor to Promote Fill Factors Approaching 77% for High‐Performance Nonfullerene Polymer Solar Cells
Author(s) -
Gao Wei,
Zhang Miao,
Liu Tao,
Ming Ruijie,
An Qiaoshi,
Wu Kailong,
Xie Dongjun,
Luo Zhenghui,
Zhong Cheng,
Liu Feng,
Zhang Fujun,
Yan He,
Yang Chuluo
Publication year - 2018
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.201800052
Subject(s) - materials science , acceptor , polar , dipole , energy conversion efficiency , polymer solar cell , small molecule , polymer , side chain , photovoltaic system , organic solar cell , molecule , optoelectronics , composite material , chemistry , organic chemistry , physics , condensed matter physics , electrical engineering , biochemistry , engineering , astronomy
In this work, an effectual strategy of constructing polar small molecule acceptors (SMAs) to promote fill factor (FF) of nonfullerene polymer solar cells (PSCs) is first reported. Three asymmetrical SMAs of IDT6CN , IDT6CN‐Th , and IDT6CN‐M , which own large dipole moments, are designed and synthesized. The PSCs based on three polar SMAs exhibit apparently higher FFs compared with their symmetrical analogues. The asymmetrical design strategy accompanied with side chain and end group engineering makes IDT6CN‐Th ‐ and IDT6CN‐M ‐based nonfullerene PSCs achieve high power conversion efficiency with FFs approaching 77%.