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  • Wu, JingnanSoochow University (author)

Carboxylate substituted pyrazine: A simple and low-cost building block for novel wide bandgap polymer donor enables 15.3% efficiency in organic solar cells

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • Elsevier BV,2021

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:8045352f-b783-49cc-8c33-db10d64b27ba
  • https://doi.org/10.1016/j.nanoen.2020.105679DOI
  • https://research.chalmers.se/publication/521713URI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • In addition to high power conversion efficiency (PCE) and good stability, the low-cost of photovoltaic materials is also very important for the practical application of organic solar cells (OSCs). Herein, we synthesized a carboxylate substituted pyrazine-based electron-deficient building block (DTCPz) with a simple structure and low synthetic cost, and then developed a novel wide bandgap polymer donor PFBCPZ. Due to the synergistic electron-withdrawing effects of the fluorination in donor unit (BDT-TF) and esterification and C=N double-bond in DTCPz unit, PFBCPZ shows a deeper HOMO level of −5.60 eV, a strong intermolecular π-π interaction, good crystallinity and stacking, and high hole-mobility of 2.11 × 10−3 cm2 V−1 s−1. Matched with a low bandgap acceptor IT-4F, excellent charge transfer, weak recombination, and small non-radiative energy loss in OSCs was achieved, resulting in an impressive fill factor of 0.785 and a high open-circuit voltage of 0.92 V. As a result, a PCE of up to 15.3% is obtained in OSCs, which is the highest value in the IT-4F-based binary OSCs so far and indicates that low-cost DTCPz with a simple structure is a promising building block to construct high-performance polymer donors for application in efficient OSCs.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Fan, Qunping,1989Soochow University,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)qunping (author)
  • Xiong, MinghaiSoochow University (author)
  • Wang, QiutangXi'an Jiaotong University (author)
  • Chen, KaiXi'an Jiaotong University (author)
  • Liu, HaiqinDonghua University (author)
  • Gao, MengyuanTianjin University (author)
  • Ye, LongNorth Carolina State University,Tianjin University (author)
  • Guo, XiaSoochow University (author)
  • Fang, JinSoochow University (author)
  • Guo, QingSoochow University (author)
  • Su, WenyanChalmers tekniska högskola,Chalmers University of Technology (author)
  • Ma, Z. F.Donghua University (author)
  • Tang, Z.Donghua University (author)
  • Wang, Ergang,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ergang (author)
  • Ade, HaraldNorth Carolina State University (author)
  • Zhang, MaojieSoochow University (author)
  • Soochow UniversityChalmers tekniska högskola (creator_code:org_t)

Related titles

  • In:Nano Energy: Elsevier BV822211-2855

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