| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Efficient transfer of metallophosphor excitons via confined polaritons in organic nanocrystals |
| Wenbin Lu(芦文斌)1, Yongcong Chen(陈永聪)1,†, Xuyun Yang(杨旭云)1, and Ping Ao(敖平)2 |
1 Shanghai Center for Quantitative Life Sciences&Physics Department, Shanghai University, Shanghai 200444, China;
2 College of Biomedical Engineering, Sichuan University, Sichuan 610064, China |
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Abstract We investigate the transfer of phosphorescent energy between co-assembled metallophosphors in crystalline nanostructures [Angew. Chem. Int. Ed. 57 7820 (2018) and J. Am. Chem. Soc. 140 4269 (2018)]. Neither Dexter's nor Förster's mechanism of resonance energy transfer (RET) could account fully for the observed rates, which exceed 85% with significant temperature dependence. But there exists an alternative pathway on RET mediated by intermediate states of resonantly confined exciton-polaritons. Such a mechanism was used to analyze artificial photosynthesis in organic fluorescents [Phys. Rev. Lett. 122 257402 (2019)]. For metallophosphors, the confined modes act as extended states lying between the molecular S1 and T1 states, offering a bridge for the long-lived T1 excitons to migrate from donors to acceptors. Population dynamics with parameters taken entirely based on experiments fits the observed lifetimes of phosphorescence across a broad range of doping and temperature.
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Received: 07 June 2023
Revised: 08 August 2023
Accepted manuscript online: 15 August 2023
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PACS:
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42.50.-p
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(Quantum optics)
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03.65.-w
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(Quantum mechanics)
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62.23.St
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(Complex nanostructures, including patterned or assembled structures)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 16Z103060007) (PA). One of us (YCC) thanks Prof. Y W Zhong for visiting Shanghai University and for an insightful discussion on the experimental works. Thanks Shanghai Nanobubble Technology Co., Ltd. for supporting this work. |
Corresponding Authors:
Yongcong Chen
E-mail: chenyongcong@shu.edu.cn
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Cite this article:
Wenbin Lu(芦文斌), Yongcong Chen(陈永聪), Xuyun Yang(杨旭云), and Ping Ao(敖平) Efficient transfer of metallophosphor excitons via confined polaritons in organic nanocrystals 2023 Chin. Phys. B 32 104212
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