期刊
NANO ENERGY
卷 92, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106681
关键词
Conjugated polymers; Compatible; High efficiency; Ternary organic solar cells; Terpolymer donor
类别
资金
- Swedish Research Council [2016-06146, 2019-04683]
- Swedish Research Council Formas
- Knut and Alice Wallen-berg Foundation [2017.0186, 2016.0059]
- National Natural Science Foundation of China [51673031, 51573154]
- Major Program of the Natural Science Research of Jiangsu Higher Education Institutions [18KJA480001]
- Top-notch Academic Programs Project (TAPP) for Polymeric Materials Science and Engineering
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- Jiangsu Provincial Talents Project of High-Level Innovation and Entrepreneurship
- Foundation of State Key Laboratory of Polymer Materials Engineering [sklpme2017-2-04]
- China Scholarship Council
- King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) [OSR-2018-CARF/CCF-3079, OSR-2019-CRG8-4095.3]
- National Research Foundation (NRF) of Korea [2019R1A6A1A11044070]
- Vinnova [2019-04683] Funding Source: Vinnova
- Swedish Research Council [2019-04683] Funding Source: Swedish Research Council
Ternary blending and random terpolymerization strategies have been proven effective for enhancing the performance of organic solar cells, with the construction of a new terpolymer PM6-Si30 showing improved efficiency in OSCs through improved charge transport and molecular arrangement.
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.
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