Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films
Singlet fission (SF) is a spin-conserving process converting 1 singlet exciton into 2 triplet excitons. This exciton multiplication mechanism offers an attractive route to solar cells that circumvent the single-junction Shockley–Queisser limit. However, it remains unclear how intermolecular coupling...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2024-01-01
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| Series: | Ultrafast Science |
| Online Access: | https://spj.science.org/doi/10.34133/ultrafastscience.0057 |
| _version_ | 1827348800959676416 |
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| author | Guang Huang Junzi Li Zilin Zhou Zongtao Huang Wei Kong Fangteng Zhang Youjun Zeng Guanyu Liu Tingchao He Lin Ma |
| author_facet | Guang Huang Junzi Li Zilin Zhou Zongtao Huang Wei Kong Fangteng Zhang Youjun Zeng Guanyu Liu Tingchao He Lin Ma |
| author_sort | Guang Huang |
| collection | DOAJ |
| description | Singlet fission (SF) is a spin-conserving process converting 1 singlet exciton into 2 triplet excitons. This exciton multiplication mechanism offers an attractive route to solar cells that circumvent the single-junction Shockley–Queisser limit. However, it remains unclear how intermolecular coupling, which is subject to the aggregation extent in thin-film morphology, controls SF pathways and dynamics. The prototype molecule 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) has been extensively studied to investigate SF mechanisms. However, previous literature reports have presented divergent SF mechanisms and pathways in TIPS-pentacene films. In this study, solvent vapor annealing treatment is used to deliberately adjust the aggregation extent in TIPS-pentacene films. This enables us to reproduce various SF pathways reported in the literature under the same experimental conditions, with the only variation being the level of aggregation. These results shed light on the crucial role that molecular aggregation plays in modulating both the SF mechanism and pathway and reconciles the previously contentious SF mechanisms and pathways reported in TIPS-pentacene films. Our study offers substantial insights into the understanding of the SF mechanism and provides a potential avenue for future control of SF pathways in accordance with specific application requirements. |
| first_indexed | 2024-03-08T00:18:29Z |
| format | Article |
| id | doaj.art-df9c1f2641d04f8fa465ab5b7b83690d |
| institution | Directory Open Access Journal |
| issn | 2765-8791 |
| language | English |
| last_indexed | 2024-03-08T00:18:29Z |
| publishDate | 2024-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Ultrafast Science |
| spelling | doaj.art-df9c1f2641d04f8fa465ab5b7b83690d2024-02-16T18:08:27ZengAmerican Association for the Advancement of Science (AAAS)Ultrafast Science2765-87912024-01-01410.34133/ultrafastscience.0057Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene FilmsGuang Huang0Junzi Li1Zilin Zhou2Zongtao Huang3Wei Kong4Fangteng Zhang5Youjun Zeng6Guanyu Liu7Tingchao He8Lin Ma9School of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, ChinaSinglet fission (SF) is a spin-conserving process converting 1 singlet exciton into 2 triplet excitons. This exciton multiplication mechanism offers an attractive route to solar cells that circumvent the single-junction Shockley–Queisser limit. However, it remains unclear how intermolecular coupling, which is subject to the aggregation extent in thin-film morphology, controls SF pathways and dynamics. The prototype molecule 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) has been extensively studied to investigate SF mechanisms. However, previous literature reports have presented divergent SF mechanisms and pathways in TIPS-pentacene films. In this study, solvent vapor annealing treatment is used to deliberately adjust the aggregation extent in TIPS-pentacene films. This enables us to reproduce various SF pathways reported in the literature under the same experimental conditions, with the only variation being the level of aggregation. These results shed light on the crucial role that molecular aggregation plays in modulating both the SF mechanism and pathway and reconciles the previously contentious SF mechanisms and pathways reported in TIPS-pentacene films. Our study offers substantial insights into the understanding of the SF mechanism and provides a potential avenue for future control of SF pathways in accordance with specific application requirements.https://spj.science.org/doi/10.34133/ultrafastscience.0057 |
| spellingShingle | Guang Huang Junzi Li Zilin Zhou Zongtao Huang Wei Kong Fangteng Zhang Youjun Zeng Guanyu Liu Tingchao He Lin Ma Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films Ultrafast Science |
| title | Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films |
| title_full | Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films |
| title_fullStr | Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films |
| title_full_unstemmed | Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films |
| title_short | Aggregation Regulated Ultrafast Singlet Fission Pathways in TIPS-Pentacene Films |
| title_sort | aggregation regulated ultrafast singlet fission pathways in tips pentacene films |
| url | https://spj.science.org/doi/10.34133/ultrafastscience.0057 |
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