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Small‐Molecule Solar Cells with Simultaneously Enhanced Short‐Circuit Current and Fill Factor to Achieve 11% Efficiency
Author(s) -
Nian Li,
Gao Ke,
Jiang Yufeng,
Rong Qikun,
Hu Xiaowen,
Yuan Dong,
Liu Feng,
Peng Xiaobin,
Russell Thomas P.,
Zhou Guofu
Publication year - 2017
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.201700616
Subject(s) - materials science , energy conversion efficiency , organic solar cell , short circuit , nanotechnology , small molecule , optoelectronics , current density , current (fluid) , photovoltaics , photovoltaic system , electrical engineering , voltage , composite material , chemistry , polymer , biochemistry , physics , quantum mechanics , engineering
High‐efficiency small‐molecule‐based organic photovoltaics (SM‐OPVs) using two electron donors ( p ‐DTS(FBTTh 2 ) 2 and ZnP) with distinctively different absorption and structural features are reported. Such a combination works well and synergically improves device short‐circuit current density ( J sc ) to 17.99 mA cm −2 and fill factor (FF) to 77.19%, yielding a milestone efficiency of 11%. To the best of our knowledge, this is the highest power conversion efficiency reported for SM‐OPVs to date and the first time to combine high J sc over 17 mA cm −2 and high FF over 77% into one SM‐OPV. The strategy of using multicomponent materials, with a selecting role of balancing varied electronic and structural necessities can be an important route to further developing higher performance devices. This development is important, which broadens the dimension and versatility of existing materials without much chemistry input.