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2022-12-14T04:01:34Z
1162:1163
Time-of-flight analysis of charge mobility in a Cu-phthalocyanine-based discotic liquid crystal semiconductor
Fujikake, H
Murashige, T
Sugibayashi, M
Ohta, K
Copyright© 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 85, 3474 (2004) and may be found at https://doi.org/10.1063/1.1805178 .
We used a time-of-flight method to study the charge carrier mobility properties of a molecular-aligned discotic liquid crystal semiconductor based on Cu-phthalocyanine. The heated isotropic-phase semiconductor material was sandwiched between transparent electrodes coated onto glass substrates without conventional alignment layers. This was then cooled, and a discotic liquid crystal semiconductor cell was obtained, which we used to make mobility measurements. The material had a fixed molecular alignment due to the supercooling of the hexagonal columnar mesophase. It was clarified that the carrier mobility for electrons was as high as it was for holes at room temperature. The maximum value of negative charge mobility reached 2.60x10(-3) cm(2)/V s, although negative carrier mobility is often much lower than positive carrier mobility in other organic semiconductors, including conventional Cu-phthalocyanine vacuum-deposited films.
Article
APPLIED PHYSICS LETTERS. 85(16):3474-3476 (2004)
AMER INST PHYSICS
2004-10-18
eng
journal article
VoR
http://hdl.handle.net/10091/17092
https://soar-ir.repo.nii.ac.jp/records/11445
https://doi.org/10.1063/1.1805178
10.1063/1.1805178
0003-6951
AA00543431
APPLIED PHYSICS LETTERS
85
16
3474
3476
https://soar-ir.repo.nii.ac.jp/record/11445/files/Time-of-flight_analysis_charge_mobility_Cu-phthalocyanine-based_discotic_liquid.pdf
application/pdf
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2015-09-28