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Boosting the efficiency of organic persistent room-temperature phosphorescence by intramolecular triplet-triplet energy transfer

Author

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  • Weijun Zhao

    (Institute of Molecular Functional Materials and The Hong Kong University of Science and Technology and the Institute for Advanced Study)

  • Tsz Shing Cheung

    (Institute of Molecular Functional Materials and The Hong Kong University of Science and Technology and the Institute for Advanced Study)

  • Nan Jiang

    (HIT Campus of University Town)

  • Wenbin Huang

    (HIT Campus of University Town)

  • Jacky W. Y. Lam

    (Institute of Molecular Functional Materials and The Hong Kong University of Science and Technology and the Institute for Advanced Study
    HKUST Shenzhen Research Institute)

  • Xuepeng Zhang

    (Institute of Molecular Functional Materials and The Hong Kong University of Science and Technology and the Institute for Advanced Study
    HKUST Shenzhen Research Institute)

  • Zikai He

    (HIT Campus of University Town)

  • Ben Zhong Tang

    (Institute of Molecular Functional Materials and The Hong Kong University of Science and Technology and the Institute for Advanced Study
    HKUST Shenzhen Research Institute
    South China University of Technology)

Abstract

Persistent luminescence is a fascinating phenomenon with exceptional applications. However, the development of organic materials capable of persistent luminescence, such as organic persistent room-temperature phosphorescence, lags behind for their normally low efficiency. Moreover, enhancing the phosphorescence efficiency of organic luminophores often results in short lifetime, which sets an irreconcilable obstacle. Here we report a strategy to boost the efficiency of phosphorescence by intramolecular triplet-triplet energy transfer. Incorpotation of (bromo)dibenzofuran or (bromo)dibenzothiophene to carbazole has boosted the intersystem crossing and provided an intramolecular triplet-state bridge to offer a near quantitative exothermic triplet–triplet energy transfer to repopulate the lowest triplet-state of carbazole. All these factors work together to contribute the efficient phosphorescence. The generation and transfer of triplet excitons within a single molecule is revealed by low-temperature spectra, energy level and lifetime investigations. The strategy developed here will enable the development of efficient phosphorescent materials for potential high-tech applications.

Suggested Citation

  • Weijun Zhao & Tsz Shing Cheung & Nan Jiang & Wenbin Huang & Jacky W. Y. Lam & Xuepeng Zhang & Zikai He & Ben Zhong Tang, 2019. "Boosting the efficiency of organic persistent room-temperature phosphorescence by intramolecular triplet-triplet energy transfer," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09561-8
    DOI: 10.1038/s41467-019-09561-8
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    Cited by:

    1. Qingao Chen & Lunjun Qu & Hui Hou & Jiayue Huang & Chen Li & Ying Zhu & Yongkang Wang & Xiaohong Chen & Qian Zhou & Yan Yang & Chaolong Yang, 2024. "Long lifetimes white afterglow in slightly crosslinked polymer systems," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Weiwei Xie & Wenbin Huang & Jietai Li & Zikai He & Guangxi Huang & Bing Shi Li & Ben Zhong Tang, 2023. "Anti-Kasha triplet energy transfer and excitation wavelength dependent persistent luminescence from host-guest doping systems," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Kaijun Chen & Yongfeng Zhang & Yunxiang Lei & Wenbo Dai & Miaochang Liu & Zhengxu Cai & Huayue Wu & Xiaobo Huang & Xiang Ma, 2024. "Twofold rigidity activates ultralong organic high-temperature phosphorescence," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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