By virtue of adiabatic dynamics method,the response of excitons upon an external electric field is studied in a conjugated polymer bimolecular structure.As the electric field strength is over the critical value,the exciton is dissociated into a couple of free electron and hole.For the excitons in a bimolecular structure,the crit-ical dissociation field is affected by the interaction of the molecules,as well as by the electron-electron interac-tion and the electron-phonon interaction.Due to the dynamical evolution calculations,the critical electric field strength of exciton dissociation decreases nonlinearly as the interchain interaction increases.The critical dissocia-tion field strength also decreases nonlinearly with the increase of electron-electron interaction strength.Howev-er,the critical dissociation field strength increases linearly as electron-phonon interaction strength increases.
关键词
共轭高聚物/双分子结构/激子/电致解离
Key words
Conjugated polymer/Bimolecular structure/Exciton/Electric field induced dissociation
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