Work

Carrier Transport and Viscosity of Discotic Liquid Crystalline Photoconductor Hexaoctyloxytriphenylene

Year: 2010

Type: article

Abstract: In this study, the carrier transport and viscosity of 2,3,6,7,10,11-hexaoctyloxytriphenylene (C8OTP) have been studied by a time-of-flight method and a rotation viscometer. One-anion and two-cation transport was observed in the isotropic liquid phase, whereas the ambipolar electronic and one-anion transport was observed in the columnar mesophase. The activation energies for the ionic conductions in the isotropic liquid phase and columnar mesophase were 0.3 and 0.3 eV, respectively. The viscosity of C8OTP was investigated in the isotropic liquid phase and the activation energy was 0.4 eV. The Stokes radii of ionic carriers were experimentally estimated using Walden's rule. The Stokes radii for one anion and two cations were approximated to be 1, 2, and 8 Å, respectively. The Stokes radius of 8 Å for the larger cation represented the molecular size of C8OTP itself, assuming that C8OTP is a flat spheroid.

Source: Japanese Journal of Applied Physics

DOI: 10.1143/jjap.49.01af04

Authors: Hirosato Monobe, Shuichi Okamoto, Hiroyuki Enomoto, Yo Shimizu

Institutions: National Institute of Advanced Industrial Science and Technology, Osaka Electro-Communication University

Language: English

Topic: Liquid Crystal Research Advancements

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Office of Science, Fusion Energy Sciences

OpenAlex ID: W1973090100

FWCI: 0.394

Cites: 29

Cited by: 7

Related to: 10