Dynamical Process of Dissociation of Excitons in Polymer Chains with Impurities

作     者：ZHAO Hong-Xia ZHAO Hui CHEN Yu-Guang 赵红霞;赵晖;陈宇光

作者机构：Department of PhysicsTongji UniversityShanghai 200092 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2011年第28卷第9期

页      面：221-224页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：by the National Natural Science Foundation of China 

主　　题：potential method dissociation 

摘      要：Within an extended Su–Schrieffer–Heeger model including impurity interactions,the dynamical process of exciton dissociation in the presence of an external electric field is investigated by using a non-adiabatic evolution *** the action of impurities,the stability as well as the effective mass of the exciton is *** results show that the field required to dissociate the excitons depends sensitively on the strength of the impurity *** the impurity potential strength increases,the dissociation field decreases *** theoretical results are expected to provide useful predictions concerning which polymers with properly impurity-assisted interactions are likely to be more suitable for use in organic solar cells.