Dynamics of Polaron at Polymer/Polymer Interface

The migration of a polaron at polymer/polymer interface is believed to be of fundamental importance for the transport and light-emitting properties of
conjugated polymer-based light emitting diodes. Based on the one-dimensional tight-binding Su--Schrieffer--Heeger (SSH) model, we have investigated polaron dynamics in a one-dimensional polymer/polymer system by using a nonadiabatic evolution method. In particular, we focus on how a polaron migrates through the conjugated polymer/polymer interface in the presence of external electric field. The results show that the migration of polaron at the interface depends sensitively on the hopping integrals, the
potential barrier induced by the energy mismatch, and the strength of applied electric field which increases the polaron kinetic energy.