Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks
Abstract Despite remarkable breakthrough made by virtue of “polymerized small‐molecule acceptor (PSMA)” strategy recently, the limited selection pool of high‐performance polymer acceptors and long‐standing challenge in morphology control impede their further developments. Herein, three PSMAs of PYDT...
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| Format: | Article |
| Language: | English |
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Wiley
2022-08-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202202022 |
| _version_ | 1827940782012628992 |
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| author | Dehong Zhou Chentong Liao Shaoqian Peng Xiaopeng Xu Yuanyuan Guo Jianlong Xia Huifeng Meng Liyang Yu Ruipeng Li Qiang Peng |
| author_facet | Dehong Zhou Chentong Liao Shaoqian Peng Xiaopeng Xu Yuanyuan Guo Jianlong Xia Huifeng Meng Liyang Yu Ruipeng Li Qiang Peng |
| author_sort | Dehong Zhou |
| collection | DOAJ |
| description | Abstract Despite remarkable breakthrough made by virtue of “polymerized small‐molecule acceptor (PSMA)” strategy recently, the limited selection pool of high‐performance polymer acceptors and long‐standing challenge in morphology control impede their further developments. Herein, three PSMAs of PYDT‐2F, PYDT‐3F, and PYDT‐4F are developed by introducing different fluorine atoms on the end groups and/or bithiophene spacers to fine‐tune their optoelectronic properties for high‐performance PSMAs. The PSMAs exhibit narrow bandgap and energy levels that match well with PM6 donor. The fluorination promotes the crystallization of the polymer chain for enhanced electron mobility, which is further improved by following n‐doping with benzyl viologen additive. Moreover, the miscibility is also improved by introducing more fluorine atoms, which promotes the intermixing with PM6 donor. Among them, PYDT‐3F exhibits well‐balanced high crystallinity and miscibility with PM6 donor; thus, the layer‐by‐layer processed PM6/PYDT‐3F film obtains an optimal nanofibril morphology with submicron length and ≈23 nm width of fibrils, facilitating the charge separation and transport. The resulting PM6/PYDT‐3F devices realizes a record high power conversion efficiency (PCE) of 17.41% and fill factor of 77.01%, higher than the PM6/PYDT‐2F (PCE = 16.25%) and PM6/PYDT‐4F (PCE = 16.77%) devices. |
| first_indexed | 2024-03-13T09:27:21Z |
| format | Article |
| id | doaj.art-8c8a33144cb9475689b06fb612911f46 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-13T09:27:21Z |
| publishDate | 2022-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-8c8a33144cb9475689b06fb612911f462023-05-26T08:56:01ZengWileyAdvanced Science2198-38442022-08-01923n/an/a10.1002/advs.202202022Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor BlocksDehong Zhou0Chentong Liao1Shaoqian Peng2Xiaopeng Xu3Yuanyuan Guo4Jianlong Xia5Huifeng Meng6Liyang Yu7Ruipeng Li8Qiang Peng9College of Chemistry Key Laboratory of Green Chemistry and Technology of Ministry of Education and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. ChinaSchool of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology Wuhan 430070 ChinaSchool of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. ChinaDivision of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 SingaporeState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology Wuhan 430070 ChinaSchool of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. ChinaSchool of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. ChinaNational Synchrotron Light Source II Brookhaven National Lab Suffolk Upton NY 11973 USACollege of Chemistry Key Laboratory of Green Chemistry and Technology of Ministry of Education and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. ChinaAbstract Despite remarkable breakthrough made by virtue of “polymerized small‐molecule acceptor (PSMA)” strategy recently, the limited selection pool of high‐performance polymer acceptors and long‐standing challenge in morphology control impede their further developments. Herein, three PSMAs of PYDT‐2F, PYDT‐3F, and PYDT‐4F are developed by introducing different fluorine atoms on the end groups and/or bithiophene spacers to fine‐tune their optoelectronic properties for high‐performance PSMAs. The PSMAs exhibit narrow bandgap and energy levels that match well with PM6 donor. The fluorination promotes the crystallization of the polymer chain for enhanced electron mobility, which is further improved by following n‐doping with benzyl viologen additive. Moreover, the miscibility is also improved by introducing more fluorine atoms, which promotes the intermixing with PM6 donor. Among them, PYDT‐3F exhibits well‐balanced high crystallinity and miscibility with PM6 donor; thus, the layer‐by‐layer processed PM6/PYDT‐3F film obtains an optimal nanofibril morphology with submicron length and ≈23 nm width of fibrils, facilitating the charge separation and transport. The resulting PM6/PYDT‐3F devices realizes a record high power conversion efficiency (PCE) of 17.41% and fill factor of 77.01%, higher than the PM6/PYDT‐2F (PCE = 16.25%) and PM6/PYDT‐4F (PCE = 16.77%) devices.https://doi.org/10.1002/advs.202202022all‐polymer solar cellsfluorinationlayer‐by‐layer processingn‐dopingpolymer acceptors |
| spellingShingle | Dehong Zhou Chentong Liao Shaoqian Peng Xiaopeng Xu Yuanyuan Guo Jianlong Xia Huifeng Meng Liyang Yu Ruipeng Li Qiang Peng Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks Advanced Science all‐polymer solar cells fluorination layer‐by‐layer processing n‐doping polymer acceptors |
| title | Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks |
| title_full | Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks |
| title_fullStr | Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks |
| title_full_unstemmed | Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks |
| title_short | Binary Blend All‐Polymer Solar Cells with a Record Efficiency of 17.41% Enabled by Programmed Fluorination Both on Donor and Acceptor Blocks |
| title_sort | binary blend all polymer solar cells with a record efficiency of 17 41 enabled by programmed fluorination both on donor and acceptor blocks |
| topic | all‐polymer solar cells fluorination layer‐by‐layer processing n‐doping polymer acceptors |
| url | https://doi.org/10.1002/advs.202202022 |
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