Design of a New Fused‐Ring Electron Acceptor with Excellent Compatibility to Wide‐Bandgap Polymer Donors for High‐Performance Organic Photovoltaics |
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| Authors: | Wenrui Liu Jianyun Zhang Zichun Zhou Dongyang Zhang Yuan Zhang Shengjie Xu Xiaozhang Zhu |
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| Affiliation: | 1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China;2. School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China;3. School of Chemistry, Beihang University, Beijing, China |
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| Abstract: | Fused‐ring electron acceptors (FREAs) have recently received intensive attention. Besides the continuing development of new FREAs, the demand for FREAs featuring good compatibility to donor materials is becoming more and more urgent, which is highly desirable for screening donor materials and achieving new breakthroughs. In this work, a new FREA is developed, ZITI , featuring an octacyclic dithienocyclopentaindenoindene central core. The core is designed by linking 2,7‐dithienyl substituents and indenoindene with small methylene groups, in which the indeno[1,2‐b]thiophene‐2‐(3‐oxo‐2,3‐dihydro‐1H‐inden‐1‐ylidene)malononitrile part provides a large and unoccupied π‐surface. Most notably, ZITI possesses an excellent compatibility with commercially available polymer donors, delivering very high power conversion efficiencies of over 13%. |
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| Keywords: | electron acceptors indenoindene organic solar cells polycyclic heteroarene power conversion efficiency |
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