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Near-Infrared Electron Acceptors with Cyano-Substituted 2-(3-Oxo-2,3-dihydroinden-1-ylidene)malononitrile End-Groups for Organic Solar Cells AITranslate

Mingqun Yang; Xiaoxin Tan; Bingyan Yin; Seoyoung Kim; Shuting Pang; Zhili Chen; Xiaoru Yang; Changduk Yang; Zhitian Liu; Chunhui Duan;
South China University of Technology; South China University of Technology; South China University of Technology; Ulsan National Institute of Science and Technology (UNIST); South China University of Technology; South China University of Technology; South China University of Technology; Ulsan National Institute of Science and Technology (UNIST); Wuhan Institute of Technology; South China University of Technology
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Abstract AITranslate

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.

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DOI：https://doi.org/10.1021/acsenergylett.3c00664

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Citation Information:

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.

quote

GB/T 7714-2015 [1] Mingqun Yang, Xiaoxin Tan, Bingyan Yin, et al. ACS Energy Letters, 2023(8). DOI:10.1021/acsenergylett.3c00664.
MLA [1] Mingqun Yang, et al., ACS Energy Letters, no. 8, 2023, https://doi.org/10.1021/acsenergylett.3c00664.
APA [1] Mingqun Yang, Xiaoxin Tan, Bingyan Yin, Seoyoung Kim, Shuting Pang, Zhili Chen, Xiaoru Yang, Changduk Yang, Zhitian Liu, & Chunhui Duan. (2023). ACS Energy Letters(8). https://doi.org/10.1021/acsenergylett.3c00664
IEEE [1] Mingqun Yang, Xiaoxin Tan, Bingyan Yin, Seoyoung Kim, Shuting Pang, Zhili Chen, Xiaoru Yang, Changduk Yang, Zhitian Liu, and Chunhui Duan, ACS Energy Letters, no. 8, 2023, doi: 10.1021/acsenergylett.3c00664.