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Dynamic recombination of triplet exciton with trapped counterion in conjugated polymers

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Abstract

The dynamic recombination of an on-chain triplet exciton with an off-chain counterion trapped in an impurity molecule has been investigated using a molecular dynamics method. It has been found that luminous composite states including the trion and the singlet exciton are the main products in the triplet exciton-counterion reaction and their yields depend sensitively on the impurity potential and the coupling between the polymer chain and the impurity molecule. We demonstrate that the triplet exciton-counterion reaction can enhance the electroluminescence efficiency considerably, and that the triplet exciton plays an important role in the photoelectric process of polymer. Our results provide a new clue to understand the electroluminescence mechanism in the polymer light-emitting devices.

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Authors and Affiliations

  1. College of Information Science and Engineering, Hebei North University, Zhangjiakou, 075000, P.R. China

    Yadong Wang, Jianjun Liu & Yanxia Liu

  2. Department of Electronics, Polytech Nice Sophia, Nice, 06200, France

    Xiru Wang

  3. Department of Physics, Xingtai University, Xingtai, 054001, P.R. China

    Yan Meng

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  1. Yadong Wang
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  2. Jianjun Liu
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  3. Yanxia Liu
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  4. Xiru Wang
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  5. Yan Meng
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Correspondence to Yadong Wang or Yan Meng.

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Wang, Y., Liu, J., Liu, Y. et al. Dynamic recombination of triplet exciton with trapped counterion in conjugated polymers. Eur. Phys. J. B 93, 173 (2020). https://doi.org/10.1140/epjb/e2020-10310-4

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  • DOI: https://doi.org/10.1140/epjb/e2020-10310-4

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