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Rational Tuning of Molecular Interaction and Energy Level Alignment Enables High‐Performance Organic Photovoltaics
Author(s) -
Wang Rui,
Yuan Jun,
Wang Rui,
Han Guangchao,
Huang Tianyi,
Huang Wenchao,
Xue Jingjing,
Wang HaoCheng,
Zhang Chunfeng,
Zhu Chenhui,
Cheng Pei,
Meng Dong,
Yi Yuanping,
Wei KungHwa,
Zou Yingping,
Yang Yang
Publication year - 2019
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.201904215
Subject(s) - materials science , organic solar cell , acceptor , absorption (acoustics) , energy conversion efficiency , polymer , photovoltaics , optoelectronics , nanotechnology , photovoltaic system , composite material , ecology , physics , biology , condensed matter physics
The performance of organic photovoltaics (OPVs) has rapidly improved over the past years. Recent work in material design has primarily focused on developing near‐infrared nonfullerene acceptors with broadening absorption that pair with commercialized donor polymers; in the meanwhile, the influence of the morphology of the blend film and the energy level alignment on the efficiency of charge separation needs to be synthetically considered. Herein, the selection rule of the donor/acceptor blend is demonstrated by rationally considering the molecular interaction and energy level alignment, and highly efficient OPV devices using both‐fluorinated or both‐nonfluorinated donor/acceptor blends are realized. With the enlarged absorption, ideal morphology, and efficient charge transfer, the devices based on the PBDB‐T‐F/Y1‐4F blend and PBDB‐T‐F/Y6 exhibit champion power conversion efficiencies as high as 14.8% and 15.9%, respectively.