Reverse polarization in conjugated heterocycle polythiophene

摘要

Reverse polarization in polythiophene under an applied electric field has been studied in the framework of the tightbinding model. It is found that the applied electronic field has a great influence on the excited states of polythiophene.The effect of the heteroatoms on the polarization has been calculated and analysed carefully. It is indicated that a reverse polarization of biexcitons in polythiophene will be observed more easily. The heteroatoms increase this reversed polarization strength apparently.