Dynamic recombination of triplet exciton with trapped counterion in conjugated polymers

被引：1

作者：

Wang, Yadong ^{[1
]}

Liu, Jianjun ^{[1
]}

Liu, Yanxia ^{[1
]}

Wang, Xiru ^{[2
]}

Meng, Yan ^{[3
]}

机构：

[1] Hebei North Univ, Coll Informat Sci & Engn, Zhangjiakou 075000, Peoples R China

[2] Polytech Nice Sophia, Dept Elect, F-06200 Nice, France

[3] Xingtai Univ, Dept Phys, Xingtai 054001, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL B | 2020年 / 93卷 / 09期

关键词：

Solid State and Materials; LIGHT-EMITTING-DIODES; ELECTROLUMINESCENCE; EFFICIENT;

D O I：

10.1140/epjb/e2020-10310-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 [凝聚态物理];

摘要：

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.

引用

页数：6

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