Hopping conduction in the columnar liquid crystal phase of a dipolar discogen
Hopping conduction in the columnar liquid crystal phase of a dipolar discogen
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DOI：
10.1063/1.2219692
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发表时间：
2006-08-15
影响因子：
3.2
通讯作者：
Whitaker, Benjamin J.
中科院分区：
文献类型：
--
作者：
Iino, Hiroaki;Hanna, Jun-ichi;Whitaker, Benjamin J.
用飞行时间法研究了含有强偶极硝基取代基的六方柱状相的空穴输运；1-nitro-2、3、6、7、10、11-hexakis (hexyloxy) triphenylene (HAT6-NO2)。与相应的未取代体系2,3,6,7,10,11-六（己氧基）三苯基（HAT6）不同，也与大多数其他液晶不同，HAT-NO2中的迁移率强烈依赖于电场和温度。在非晶态固体中，无序占主导地位的跳跃和迁移率可以使用能量无序参数来建模，sigma刚刚超过100 meV。与HAT6相比，由于硝基的强偶极子，HAT6- no2的无序性增强。(c) 2006年美国物理研究所。
Hole transport has been investigated by the time-of-flight method for the hexagonal columnar phase of a discogen containing a strongly dipolar nitro substituent; 1-nitro-2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6-NO2). Unlike the corresponding unsubstituted system, 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6), and unlike most other liquid crystals, the mobility in HAT-NO2 depends strongly on both electric field and temperature. As in amorphous solids there is disorder dominated hopping and the mobility can be modeled using an energy disorder parameter, sigma of just over 100 meV. Compared to HAT6, the disorder in HAT6-NO2 is enhanced because of the strong dipole of the nitro group. (c) 2006 American Institute of Physics.