Over 18% ternary polymer solar cells enabled by a terpolymer as the third component

Wenhong Peng, Yuanbao Lin, Sang Young Jeong, Zewdneh Genene, Artiom Magomedov, Han Young Woo, Cailing Chen, Wandi Wahyudi, Qiang Tao, Jiyong Deng, Yu Han, Vytautas Getautis, Weiguo Zhu, Thomas D. Anthopoulos, Ergang Wang

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

“Ternary blending” and “random terpolymerization” strategies have both proven effective for enhancing the performance of organic solar cells (OSCs). However, reports on the combination of the two strategies remain rare. Here, a terpolymer PM6-Si30 was constructed by inserting chlorine and alkylsilyl-substituted benzodithiophene (BDT) unit (0.3 equivalent) into the state-of-the-art polymer PM6. The terpolymer exhibitsadeep highest-occupied-molecular-orbital energy and good miscibility with both PM6 and BTP-eC9 (C9) and enables its use as a third component into PM6:PM6-Si30:C9 bulk-heterojunction for OSCs. The resulting cells exhibit maximum power conversion efficiency (PCE) of 18.27%, which is higher than that obtained for the optimized control binary PM6:C9-based OSC (17.38%). The enhanced performance of the PM6:PM6-Si30:C9 cells is attributed to improved charge transport, favorable molecular arrangement, reduced energy loss and suppressed bimolecular recombination. The work demonstrates the potential of random terpolymer as a third component in OSCs and highlights a new strategy for the construction of a ternary system with improved photovoltaic performance.
Original languageEnglish (US)
Pages (from-to)106681
JournalNano Energy
Volume92
DOIs
StatePublished - Nov 5 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-11-29
Acknowledged KAUST grant number(s): OSR-2018-CARF/CCF-3079, OSR-2019-CRG8-4095.3
Acknowledgements: We thank the Swedish Research Council (2016-06146, 2019-04683), the Swedish Research Council Formas and the Knut and Alice Wallenberg Foundation (2017.0186, 2016.0059) for financial support. This work is also supported by the National Natural Science Foundation of China (51673031, 51573154), the Major Program of the Natural Science Research of Jiangsu Higher Education Institutions (18KJA480001), the Top-notch Academic Programs Project (TAPP) for Polymeric Materials Science and Engineering & the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions, Jiangsu Provincial Talents Project of High-Level Innovation and Entrepreneurship, and the Foundation of State Key Laboratory of Polymer Materials Engineering (sklpme2017-2-04). W. P. thanks the support by China Scholarship Council, and Y. L. and T. D. A. by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079, and No: OSR-2019-CRG8-4095.3. H.Y.W acknowledges the financial support from the National Research Foundation (NRF) of Korea (2019R1A6A1A11044070).

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering

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