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Delayed room temperature phosphorescence enabled by phosphines

Author

Listed:
  • Guang Lu

    (Heilongjiang University)

  • Jing Tan

    (Heilongjiang University)

  • Hongxiang Wang

    (Heilongjiang University)

  • Yi Man

    (Heilongjiang University)

  • Shuo Chen

    (Heilongjiang University)

  • Jing Zhang

    (Heilongjiang University)

  • Chunbo Duan

    (Heilongjiang University)

  • Chunmiao Han

    (Heilongjiang University)

  • Hui Xu

    (Heilongjiang University)

Abstract

Organic ultralong room-temperature phosphorescence (RTP) usually emerges instantly and immediately decays after excitation removal. Here we report a new delayed RTP that is postponed by dozens of milliseconds after excitation removal and decays in two steps including an initial increase in intensity followed by subsequent decrease in intensity. The delayed RTP is achieved through introduction of phosphines into carbazole emitters. In contrast to the rapid energy transfer from single-molecular triplet states (T1) to stabilized triplet states (Tn*) of instant RTP systems, phosphine groups insert their intermediate states (TM) between carbazole-originated T1 and Tn* of carbazole-phosphine hybrids. In addition to markedly increasing emission lifetimes by ten folds, since TM → Tn* transition require >30 milliseconds, RTP is thereby postponed by dozens of milliseconds. The emission character of carbazole-phosphine hybrids can be used to reveal information through combining instant and delayed RTP, realizing multi-level time resolution for advanced information, biological and optoelectronic applications.

Suggested Citation

  • Guang Lu & Jing Tan & Hongxiang Wang & Yi Man & Shuo Chen & Jing Zhang & Chunbo Duan & Chunmiao Han & Hui Xu, 2024. "Delayed room temperature phosphorescence enabled by phosphines," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47888-z
    DOI: 10.1038/s41467-024-47888-z
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    References listed on IDEAS

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