Dynamic recombination of triplet exciton with trapped counterion in conjugated polymers

Yadong Wang (), Jianjun Liu, Yanxia Liu, Xiru Wang and Yan Meng ()
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Yadong Wang: College of Information Science and Engineering, Hebei North University
Jianjun Liu: College of Information Science and Engineering, Hebei North University
Yanxia Liu: College of Information Science and Engineering, Hebei North University
Xiru Wang: Polytech Nice Sophia
Yan Meng: Xingtai University

The European Physical Journal B: Condensed Matter and Complex Systems, 2020, vol. 93, issue 9, 1-6

Abstract: 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. Graphical abstract

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1140/epjb/e2020-10310-4

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