Dynamics study of the recombination of polaron pairs in polymer chain with impurities

被引：7
作者：
Lu, Qing [1 ,2 ]
Zhao, Hui [1 ,2 ]
Chen, Yuguang [1 ,2 ]
Yan, Yonghong [3 ]
机构：
[1] Tongji Univ, Key Lab Adv Microstruct Mat, Minist Educ, Shanghai 200092, Peoples R China
[2] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China
[3] Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2013年 / 421卷
基金：
中国国家自然科学基金;
关键词：
Polaron; Exciton; Polymer; Electron-lattice interaction; LIGHT-EMITTING-DIODES; ELECTROCHEMICAL-CELLS; CONJUGATED POLYMERS; CONDUCTING POLYMERS; ELECTRIC-FIELD; POLYACETYLENE; INJECTION; DEVICES; SCATTERING; EFFICIENT;
D O I：
10.1016/j.physb.2013.04.007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Within a Su-Schrieffer-Heeger model modified to include an external electric field, the dynamical process of oppositely charged polarons in a polymer chain is simulated by using a non-adiabatic evolution method. It is found that the polaron pair can combine with neutral exciton in the presence of a weak electric field, and the field requirement for achieving exciton is very strict in a pure polymer chain. But under the assistance of impurities, the exciton can be produced under a wide range of applied field strengths. The yield of neutral exciton can reach as high as 96%, which is significant for electroluminescent efficiency of OLEDs. (C) 2013 Elsevier By. All rights reserved.
引用
收藏
页码：13 / 17
页数：5
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