Near-Infrared Electron Acceptors with Cyano-Substituted 2-(3-Oxo-2,3-dihydroinden-1-ylidene)malononitrile End-Groups for Organic Solar Cells
Source abstract
Abstract
Near-infrared (NIR) electron acceptors are critical components for constructing organic solar cells (OSCs). Herein, we report a set of A-DA′D-A-type electron acceptors with end-groups of cyano-substituted 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (CN-IC), which possesses the strongest electron-withdrawing ability among the end-groups reported to date. An optical bandgap as low as 1.29 eV was obtained for the electron acceptors with CN-IC end-groups, which is decreased by 0.12 eV with respect to that of the reference electron acceptor. Meanwhile, deep-lying frontier molecular orbital energy levels were maintained in these electron acceptors. These advantages endow the electron acceptors with a broad light-harvesting range and the capacity to match prevalent polymer donors. Consequently, OSCs with a power conversion efficiency of 18.1% were obtained. These results suggest the huge potential of CN-IC in constructing NIR electron acceptors.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
Low Dimensional Carbon Materials Center, Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea
Institute of Materials for Optoelectronics and New Energy, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Funding
Guangdong Province Introduction of Innovative R&D Team · Ministry of Science and Technology of the People's Republic of China · National Research Foundation of Korea · Basic and Applied Basic Research Foundation of Guangdong Province · China Postdoctoral Science Foundation · National Natural Science Foundation of China
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