一维二嵌段高聚物中电荷输运的分子弹性效应

摘要

Based on an extended SSH (Su-Schrieffer-Heeger) model, the influence of molecular elasticity on charge transport in one-dimensional (ID) diblock copolymers was studied. We find that due to the difference in molecular elasticity between the two polymer segments, there exists a barrier for charge carrier tunneling. The critic field strength can be effectively reduced by increasing the kinetic energy of the electron. However, by increasing the elasticity difference between the two polymer segments, the critic field strength is increased.%基于扩展SSH (Su-Schrieffer- Heeger)模型并采用动力学方法讨论了一维二嵌段高聚物中分子弹性对电荷输运的影响.我们发现,由于两嵌段高聚物中分子弹性的差异t在其交界处会形成一个载流子跃迁势垒.增大注入电子的动能将有效降低电子隧穿的临界电场,而加大两段高聚物弹性的差别将增大临界电场的强度.