【摘要】 在Baranowski B櫣ttner Voit模型下,研究了计入静电场后聚对苯亚胺PNB(pernigraniline base)中的双激子(biexciton)激发态.数值计算表明,当电场为零时,双激子是自陷的极化子双激子;随着电场强度E的增加,缺陷将沿电场方向发生移动;而当E 1.8×104V/cm时,双激子将被静电场解离,形成正、负双极化子(bipolaron)而束缚在链端.这与赵等人关于高分子(如PPV,PPQ等)在强电场下,双激子不能产生而只能形成双极化子的结论相似.计算中没有出现反向极化现象.更多还原

【Abstract】 The biexciton in a PNB polymer and its response to the electric field have been studied in the framework of the BBV model. The numerical calculations show that the biexciton in this polymer is selftrapped and move along the main chain in weak electric field. When E1.8×104 V/cm, the biexciton is dissociated into a pair of positive and negative polarons. The reverse polarization of the biexciton has not been found in our calculation.更多还原