Electron-Transporting Polymer with Perfluoroalkyl Spacer Enables Efficient and Stable Non-Fullerene Organic Solar Cells
To achieve efficient and stable organic solar cells (OSCs), interfacial dipole and suitable wettability are prerequisites for interlayer materials, in addition to the aligned energy level and high conductivity. However, these have been rarely realized simultaneously in electron-transporting layer (ETL) materials to date. Herein, an electron-transporting polymer, PPDIN-C6-F, by integrating the perylene diimide (PDI) segment and the fluorinated alkyl spacer (C6F12) was synthesized via a cost-effective quaternization polymerization reaction. Compared to the control polymer, PPDIN-C6-H, with the C6H12 spacer, PPDIN-C6-F shows exceptional capabilities in film formation, self-doping, and electrical conductivity. When PPDIN-C6-F was used as the ETL in OSCs, decreased energy barrier and minimized interfacial defects can be obtained. Consequently, PPDIN-C6-F demonstrated superior device performance, delivering a remarkable power conversion efficiency (PCE) up to 18.68% in PM6:L8-BO-based OSCs. Notably, the OSCs based on PPDIN-C6-F ETL display excellent storage and thermal stability with 91% and 79% of the initial PCEs maintained after aged for 1000 and 600 h, respectively, which have decayed to 84% and 59% for those with PPDIN-C6-H as ETL. Furthermore, its versatility is highlighted in OSCs with various photoactive layers, and a high PCE up to 19.20% can be provided in the ternary PM6:SD-EDOT:L8-BO system.
Authors
- Dongdong Xia (ORCID: https://orcid.org/0000-0002-4520-0992)
- Qian Xie (ORCID: https://orcid.org/0000-0002-0176-6716)
- Chaowei Zhao (ORCID: https://orcid.org/0000-0002-0282-8798)
- Lang Jiang (ORCID: https://orcid.org/0000-0003-3624-1618)
- Jie Fang (ORCID: https://orcid.org/0000-0003-4724-0215)
- Xudong Jiang (ORCID: https://orcid.org/0000-0002-9104-2315)
- Rongrong Li (ORCID: https://orcid.org/0000-0003-0661-3521)
- Weiwei Li (ORCID: https://orcid.org/0000-0002-7329-4236)
- Jiali Wang (ORCID: https://orcid.org/0000-0002-0780-5624)
- Cheng Luo (ORCID: https://orcid.org/0009-0003-2405-1662)
- Xiang Chen (ORCID: https://orcid.org/0000-0002-7686-6308)
- Yu Xie (ORCID: https://orcid.org/0000-0002-3092-5122)
- Yuefeng Zhang (ORCID: https://orcid.org/0000-0003-3768-068X)
- Shengyong You (ORCID: https://orcid.org/0009-0008-1086-8600)
- Zhiyun Hu (ORCID: https://orcid.org/0000-0002-2737-7452)
Institutions
- Chinese Academy of Sciences (CN)
- Beijing National Laboratory for Molecular Sciences (CN)
- Chinese University of Hong Kong, Shenzhen (CN)
- Institute of Chemistry (CN)
- Jiangxi Academy of Sciences (CN)
- Beijing University of Chemical Technology (CN)
- Taizhou University (CN)
- University of South China (CN)
- Nanchang Hangkong University (CN)
Publication Details
- Journal
- Macromolecules
- Published
- 2024-08-29
- DOI
- https://doi.org/10.1021/acs.macromol.4c01285
- Citations
- 11
- Primary Topic
- Organic Electronics and Photovoltaics
- Type
- article
- Field-Weighted Citation Impact
- 2.30
Funders
- Education Department of Hunan Province
- National Natural Science Foundation of China
- Ministry of Human Resources and Social Security
- Society of Hong Kong Scholars
- Jiangxi Provincial Department of Science and Technology
- Jiangxi Academy of Sciences