Concentration Dependence of the Activation Energy for the Hole Drift Mobility of 9-Ethylcarbazole-3-carbaldehyde Hydrazones

被引：8

作者：

Nomura, Satoyuki ^{[1
]}

Shirota, Yasuhiko ^{[1
]}

机构：

[1] Osaka Univ, Fac Engn, Dept Appl Chem, Suita, Osaka 565, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1998年 / 315卷

关键词：

hole drift mobility; activation energy; concentration dependence; arylaldehyde hydrazone; carbazole moiety;

D O I：

10.1080/10587259808044335

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A new type of concentration dependence, i.e., intersite-distance () dependence, of the activation energy for the hole drift mobility of the 9-ethylcarbazole-3-carbaldehyde diphenylhydrazone (ECH) and 9-ethylcarbazole-3-carbaldehyde methylphenylhydrazone (ECMH) dispersed in polycarbonate (PC) is reported. The activation energy for charge transport in the ECH or ECMH-doped PC systems gradually decreases with decreasing for large values of , becoming nearly constant for small values of . This behavior contrasts with that for the 4-diphenylaminobenzaldehyde diphenylhydrazone (DPH)-doped PC system. Specific intermolecular interactions between ECH or ECMH molecules having a planar carbazole moiety at relatively high concentrations are suggested to be responsible for this concentration dependence of the activation energy.

引用

页码：217 / 222

页数：6

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