Highly Efficient Acceptors with a Nonaromatic Thianthrene Central Core for Organic Photovoltaics
Abstract
Abstract Despite the great role in determining molecular packings and organic photovoltaic outcomes, very rare candidates could be employed as central cores in current high‐performance acceptors except diimide‐based moieties. Herein, a new type of central core of nonaromatic thianthrene is explored firstly, affording an exotic but structurally tailorable molecular platform for acceptor design. A unique puckered rather than planar conformation of central core is adopted, caused by the 4n πe − feature, great ring strain and largely the insufficient p–π orbital overlap of lone pair on sulfur of thianthrene and coterminous benzene planes. As a result, the absorption of thianthrene‐based acceptors (CS1, CS2, and CS3) shows unexpected blue shift comparing to the phenazine‐based counterpart (CH20), regardless of the intrinsically strong electron‐donating characteristic of low valence sulfur atoms. Even so, the desired molecular packing and fibrillary film morphology, assisted by the suitable chlorination on thianthrene, still contribute to the best device efficiency of 19.0% based on D18:CS2 blends. Such novel work renders an underdeveloped NFA platform with the potentials for achieving PCE of over 20%.
Article Details
Authors (13)
Zheng Xu
Xiangjian Cao
State Key Laboratory and Institute of Elemento‐Organic Chemistry The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Renewable Energy Conversion and Storage Center (RECAST) College of Chemistry Nankai University Tianjin 300071 China
Zhaoyang Yao
State Key Laboratory and Institute of Elemento-Organic Chemistry, The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry
Wenkai Zhao
Frontiers Science Center for New Organic Matter, Tianjin Key Lab for Rare Earth Materials and Applications, Renewable Energy Conversion and Storage Center (RECAST), School of Materials Science and Engineering, National Institute for Advanced Materials
Wendi Shi
State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials, College of Chemistry, Renewable Energy Conversion and Storage Center (RECAST)
Xingqi Bi
State Key Laboratory and Institute of Elemento‐Organic Chemistry The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Renewable Energy Conversion and Storage Center (RECAST) College of Chemistry Nankai University Tianjin 300071 China
Yu Li
Yaxiao Guo
State Key Laboratory of Advanced Separation Membrane Materials School of Chemistry Tiangong University Tianjin China
Guanghui Li
Guankui Long
Frontiers Science Center for New Organic Matter, Tianjin Key Lab for Rare Earth Materials and Applications, Renewable Energy Conversion and Storage Center (RECAST), School of Materials Science and Engineering, National Institute for Advanced Materials
Xiangjian Wan
State Key Laboratory and Institute of Elemento-Organic Chemistry, The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry
Chenxi Li
State Key Laboratory and Institute of Elemento-Organic Chemistry, The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry
Yongsheng Chen
Department of Neurosurgery The Tenth Affiliated Hospital Southern Medical University Dongguan China