Fused perylene diimide-based polymeric acceptors with different $\mathcal{π}$-conjugation and molecular conformation in all polymer solar cells

Shen, Guangrui; Wang, Ling; Wu, Xia; Yuan, Peng; Tang, Yumin; Chen, Yumeng; Hang, Xiao-Chun; Chen, Zhi-Kuan; Zhang, Honghai; Sun, Zhengyi

doi:10.1016/j.dyepig.2022.110462

Title: Fused perylene diimide-based polymeric acceptors with different $$\mathcal{π}$$-conjugation and molecular conformation in all polymer solar cells

Journal Article · 02 June 2022 · Dyes and Pigments

DOI: https://doi.org/10.1016/j.dyepig.2022.110462 · OSTI ID:1876273

Shen, Guangrui ^[1]; Wang, Ling ^[1]; Wu, Xia ^[1]; Yuan, Peng ^[1]; Tang, Yumin ^[1]; Chen, Yumeng ^[1]; Hang, Xiao-Chun ^[1]; Chen, Zhi-Kuan ^[2];

^[1];

^[1]

Nanjing Technical University (China)
University of Nottingham, Ningbo (China)

Two perylene diimide (PDI) based polymeric acceptors, PFPDIBT-TT2F and PFPDIT-TT2F, which consist of fused-PDI moieties (FPDIBT and FPDIT) and 3,3'-difluoro-2,2'-bithiophene (TT2F) units, has been designed and synthesized. Compared with the unfused-PDI polymer (PPDI-TT2F) as the control molecule, the influence of structural conformation and π-conjugation extension on the performance of all-polymer solar cells has been investigated. Due to both the extended π-conjugation and the torsional polymer skeleton, the device adopting PFPDIT-TT2F achieved an obviously improved PCE of 5.11% comparing with the devices using the other two polymeric acceptors. This study demonstrates that the fused PDIs bridged by a thiophene enables both extended π-conjugation and twisted molecular conformation, and the latter plays a dominant role in the improvement of device performance.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Natural Science Foundation of China; Natural Science Foundation of Jiangsu Province; USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1876273

Journal Information:: Dyes and Pigments, Journal Name: Dyes and Pigments Journal Issue: 1 Vol. 204; ISSN 0143-7208

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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