Fused Nonacyclic Electron Acceptors for Efficient Polymer Solar Cells
Open accessAbstract
We design and synthesize four fused-ring electron acceptors based on 6,6,12,12-tetrakis(4-hexylphenyl)-indacenobis(dithieno[3,2- b;2′,3′- d ]thiophene) as the electron-rich unit and 1,1-dicyanomethylene-3-indanones with 0–2 fluorine substituents as the electron-deficient units. These four molecules exhibit broad (550–850 nm) and strong absorption with high extinction coefficients of (2.1–2.5) × 10 5 M –1 cm –1 . Fluorine substitution downshifts the LUMO energy level, red-shifts the absorption spectrum, and enhances electron mobility. The polymer solar cells based on the fluorinated electron acceptors exhibit power conversion efficiencies as high as 11.5%, much higher than that of their nonfluorinated counterpart (7.7%). We investigate the effects of the fluorine atom number and position on electronic properties, charge transport, film morphology, and photovoltaic properties.
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Fluorination of conjugated polymers affects their energy levels and intra- and intermolecular interactions.
“In addition, the fluorination of CPs affects their energy levels and intra- and intermolecular interactions.177”
From The Pursuit of Shortwave Infrared-Emitting Nanoparticles with Bright Fluorescence through Molecular Design and Excited-State Engineering of Molecular Aggregates (2022) · cites this paper as [177]
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- Authors
- Dai, S., Zhao, F., Zhang, Q., Lau, T.-K., Li, T., Liu, K., Ling, Q., Wang, C., Lu, X., You, W., & Zhan, X.
- Affiliations
- Fujian Normal University (CN)
- Chinese Academy of Sciences (CN)
- University of North Carolina at Chapel Hill (US)
- Chinese University of Hong Kong (HK)
- Peking University (CN)
- Corresponding author
- Zhan, Xiaowei
- ORCID
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-01-13
- Volume
- 139
- Issue
- 3
- Pages
- 1336-1343
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2570753647
- Cited by
- 864
- References
- 64
- Citations by year
- 2026: 15 · 2025: 19 · 2024: 29 · 2023: 26 · 2022: 69 · 2021: 83 · 2020: 129 · 2019: 156 · 2018: 205 · 2017: 133
- FWCI
- 70.78
- Type
- journal article
- Language
- en
- Open access
- green
- doi.org
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
- UNC Libraries
- Funders
- Research Grants Council, University Grants Committee (14303314)
- Ministry of Science and Technology of the People's Republic of China (2013CB834702)
- Office of Naval Research (N000141410221)
- National Natural Science Foundation of China (91433114)
- Chinese University of Hong Kong (4053128)
- Division of Materials Research (DMR-1507249)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
- Keywords
- polymer solar cells, fused-ring acceptors, LUMO energy, electron mobility, charge transport, film morphology, power conversion efficiency, absorption spectra
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