中国物理B ›› 2023, Vol. 32 ›› Issue (10): 104212-104212.doi: 10.1088/1674-1056/acf03b

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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. 1 Shanghai Center for Quantitative Life Sciences&Physics Department, Shanghai University, Shanghai 200444, China;
    2 College of Biomedical Engineering, Sichuan University, Sichuan 610064, China
  • 收稿日期:2023-06-07 修回日期:2023-08-08 接受日期:2023-08-15 出版日期:2023-09-21 发布日期:2023-09-27
  • 通讯作者: Yongcong Chen E-mail:chenyongcong@shu.edu.cn
  • 基金资助:
    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.

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. 1 Shanghai Center for Quantitative Life Sciences&Physics Department, Shanghai University, Shanghai 200444, China;
    2 College of Biomedical Engineering, Sichuan University, Sichuan 610064, China
  • Received:2023-06-07 Revised:2023-08-08 Accepted:2023-08-15 Online:2023-09-21 Published:2023-09-27
  • Contact: Yongcong Chen E-mail:chenyongcong@shu.edu.cn
  • Supported by:
    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.

摘要: 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.

关键词: organic nanocrystals, phosphorescent emission, resonance energy transfer, exciton-polariton

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.

Key words: organic nanocrystals, phosphorescent emission, resonance energy transfer, exciton-polariton

中图分类号:  (Quantum optics)

  • 42.50.-p
03.65.-w (Quantum mechanics) 62.23.St (Complex nanostructures, including patterned or assembled structures)