Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance
Fluorination of conjugated polymers is an effective strategy to tune the energy levels for obtaining high power conversion efficiency (PCE) in organic solar cells. In this work, we have developed fluoro-modulated molecular geometries in diketopyrrolopyrrole based low-bandgap copolymers. In these pol...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-05-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2019.00333/full |
| _version_ | 1819111957826895872 |
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| author | Cai'e Zhang Yahui Liu Jia Tu Shouli Ming Xinjun Xu Zhishan Bo |
| author_facet | Cai'e Zhang Yahui Liu Jia Tu Shouli Ming Xinjun Xu Zhishan Bo |
| author_sort | Cai'e Zhang |
| collection | DOAJ |
| description | Fluorination of conjugated polymers is an effective strategy to tune the energy levels for obtaining high power conversion efficiency (PCE) in organic solar cells. In this work, we have developed fluoro-modulated molecular geometries in diketopyrrolopyrrole based low-bandgap copolymers. In these polymers, planar conformation can be locked by intramolecular non-covalent interaction (intramolecular supramolecular interaction) between the sulfur atoms and the introduced F atoms (F···S interaction). By varying the fluorinated moieties, such a planarity can be disturbed and the molecular geometry is tuned. As a result, the polymer' properties can be modulated, including the ultraviolet-visible absorption spectrum to become broaden, charge mobility to be enhanced, open-circuit voltage (Voc) and short-circuited current (Jsc) to be elevated, and thus photovoltaic performance to be improved. The photovoltaic device based on PCFB, one of the fluorinated terpolymers, exhibited a high PCE near 8.5% with simultaneously enhanced Voc and Jsc relative to the non-fluorinated one (PCB). |
| first_indexed | 2024-12-22T04:05:52Z |
| format | Article |
| id | doaj.art-64ad9b832baa433e8f6f475db0ba8158 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-22T04:05:52Z |
| publishDate | 2019-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-64ad9b832baa433e8f6f475db0ba81582022-12-21T18:39:38ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462019-05-01710.3389/fchem.2019.00333456893Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic PerformanceCai'e ZhangYahui LiuJia TuShouli MingXinjun XuZhishan BoFluorination of conjugated polymers is an effective strategy to tune the energy levels for obtaining high power conversion efficiency (PCE) in organic solar cells. In this work, we have developed fluoro-modulated molecular geometries in diketopyrrolopyrrole based low-bandgap copolymers. In these polymers, planar conformation can be locked by intramolecular non-covalent interaction (intramolecular supramolecular interaction) between the sulfur atoms and the introduced F atoms (F···S interaction). By varying the fluorinated moieties, such a planarity can be disturbed and the molecular geometry is tuned. As a result, the polymer' properties can be modulated, including the ultraviolet-visible absorption spectrum to become broaden, charge mobility to be enhanced, open-circuit voltage (Voc) and short-circuited current (Jsc) to be elevated, and thus photovoltaic performance to be improved. The photovoltaic device based on PCFB, one of the fluorinated terpolymers, exhibited a high PCE near 8.5% with simultaneously enhanced Voc and Jsc relative to the non-fluorinated one (PCB).https://www.frontiersin.org/article/10.3389/fchem.2019.00333/fulldiketopyrrolopyrrolefluorinationsupramolecular interactionpolymer solar cellphotovoltaic performance |
| spellingShingle | Cai'e Zhang Yahui Liu Jia Tu Shouli Ming Xinjun Xu Zhishan Bo Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance Frontiers in Chemistry diketopyrrolopyrrole fluorination supramolecular interaction polymer solar cell photovoltaic performance |
| title | Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance |
| title_full | Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance |
| title_fullStr | Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance |
| title_full_unstemmed | Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance |
| title_short | Fluoro-Modulated Molecular Geometry in Diketopyrrolopyrrole-Based Low-Bandgap Copolymers for Tuning the Photovoltaic Performance |
| title_sort | fluoro modulated molecular geometry in diketopyrrolopyrrole based low bandgap copolymers for tuning the photovoltaic performance |
| topic | diketopyrrolopyrrole fluorination supramolecular interaction polymer solar cell photovoltaic performance |
| url | https://www.frontiersin.org/article/10.3389/fchem.2019.00333/full |
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