Funahashi Masahiro, Sonoda Akinari
2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan.
Phys Chem Chem Phys. 2014 May 7;16(17):7754-63. doi: 10.1039/c4cp00579a.
Electron transport characteristics in nanosegregated columnar phases of perylene tetracarboxylic bisimide (PTCBI) derivatives bearing oligosiloxane chains are studied over wide temperature ranges using a time-of-flight (TOF) method. In the ordered columnar phases of the PTCBI derivatives bearing disiloxane chains, the electron mobilities exceed 0.1 cm(2) V(-1) s(-1) at room temperature. In the disordered columnar phase of the PTCBI derivative bearing trisiloxane chains, the electron mobility reaches the order of 10(-3) cm(2) V(-1) s(-1) at around room temperature. These electron mobilities are temperature-independent at around room temperature. However, their dependence upon the electric field becomes larger when the temperature is lowered below room temperature; this behavior is described by a hopping transport mechanism. The experimental results are analyzed using a one-dimensional disorder model.
采用飞行时间（TOF）方法，在很宽的温度范围内研究了带有低聚硅氧烷链的苝四羧酸二酰亚胺（PTCBI）衍生物的纳米分离柱状相中的电子传输特性。在带有二硅氧烷链的PTCBI衍生物的有序柱状相中，室温下电子迁移率超过0.1 cm² V⁻¹ s⁻¹。在带有三硅氧烷链的PTCBI衍生物的无序柱状相中，室温附近电子迁移率达到10⁻³ cm² V⁻¹ s⁻¹量级。这些电子迁移率在室温附近与温度无关。然而，当温度降低到室温以下时，它们对电场的依赖性变得更大；这种行为可用跳跃传输机制来描述。使用一维无序模型对实验结果进行了分析。
