原子与分子物理学报2012，Vol.29Issue(2)：295-300,6.DOI:103969/j.issn.1000-0364.2012.02.018
共轭高聚物中极化子散射引起的激子迁移
Exciton migration induced by scattering with a polaron in conjugated polymers
摘要
Abstract
Based on the Su-Schrieffer-Heeger(SSH) model extended to include the Brazovskii-Kirova symmetry breaking term,we investigate the scattering process between an injected polaron and an exciton in the presence of an electric field in a conjugated polymer chain.It is found that the polaron can always pass through the exciton in the presence of an external electric field.In contrast,the behavior of the exciton strongly depends on the electric field strength.If the field strength is greater than a critical value of about 3.0× 105 V/cm,the exciton does not move after the collision with the polaron.However,if the field strength is less than the critical value,the exciton has an obvious migration in the opposite direction of the moving polaron.This migration of exciton under weak electric fields is originally attributed to a slow scattering process with the charged polaron.关键词
共轭高聚物/激子迁移/非绝热动力学Key words
conjugated polymers/exciton migration/nonadiabatic dynamics分类
数理科学引用本文复制引用
王晓磊,邱宇..共轭高聚物中极化子散射引起的激子迁移[J].原子与分子物理学报,2012,29(2):295-300,6.基金项目
国家自然科学基金(20974101) （20974101）
