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Thienoquinolinone-based acceptor-π-acceptor-type building block for polymer donors in organic solar cells

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Abstract

Thienoquinolinone (TQO) is a promising electron-accepting building block for donor–acceptor-type semiconducting copolymers in organic photovoltaic cells. Polymer donors comprising TQO and benzodithiophene (BDT) exhibited relatively wide bandgaps and deep frontier molecular orbital energy levels. In this study, a new TQO-based electron-accepting building block (BTQ), comprising two TQO units with a thiophene π-bridge, was designed and synthesized to induce broad absorption. Two copolymers were synthesized by Stille coupling polymerization: one comprising BDT and BTQ (PBDT-BTQ) and the other comprising fluorine-substituted BDT and BTQ (PFBDT-BTQ). These polymers showed red-shifted absorption compared to the corresponding TQO-based copolymer (PBDT-TQO) owing to extended π-conjugation. Organic photovoltaic cells based on copolymer: IT-4F were fabricated and characterized. The fabricated devices showed a maximum power conversion efficiency of 8.55%.

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Acknowledgements

This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (NRF-2020R1A2C2008757 and NRF-2021R1C1C2007445).

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Authors and Affiliations

  1. Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Republic of Korea

    Jong-Woon Ha, Jae Gyeong Jung, Suha Lee & Do-Hoon Hwang

  2. Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea

    Du Hyeon Ryu & Chang Eun Song

  3. Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology, Ulsan, 681-802, Republic of Korea

    Bogyu Lim, Yu Jin Jung & Jong Mok Park

  4. Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, South Korea

    Jong-Woon Ha

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  1. Jong-Woon Ha
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Correspondence to Do-Hoon Hwang.

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Ha, JW., Jung, J.G., Ryu, D.H. et al. Thienoquinolinone-based acceptor-π-acceptor-type building block for polymer donors in organic solar cells. Macromol. Res. 31, 25–31 (2023). https://doi.org/10.1007/s13233-023-00112-1

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  • DOI: https://doi.org/10.1007/s13233-023-00112-1

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