期刊
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS
卷 44, 期 42-45, 页码 L1310-L1312出版社
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.44.L1310
关键词
ambipolar carrier transport; discotic liquid crystal; electronic transport; phthalocyanine derivative; electron mobility; time-of-flight method
We have investigated charge carrier transport in the various phases of the metal-free phthalocyanine derivative, 1,4,8,11, 15,18,22,,25-octaoctylphthalocyanine (8H(2)Pc), by the time-of-flight method. The discotic columnar phase of 8H2Pc easily self-organizes in columns perpendicular to the substrate when cooled from the isotropic phase. We found that well-defined transits were observed, not only for positive carriers, but also for negative carriers. For the columnar rectangular phase at 85 degrees C the hole and electron mobilities were very high at 0.2 and 0.3 cm(2) /(V(.)s), respectively. These mobilities depend on neither electric field nor temperature. This ambipolar carrier transport was easily observed even in an ambient atmosphere. interestingly, the mobility in the isotropic phase was of the order of 10(-3) cm(2) /(V(.)s) and did not depend on temperature, which suggests that the electronic conduction is governed by charge carrier transport in that phase as well.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据