Modeling of electronic charge transport in smectic liquid crystals

Akira Ohno; Kensuke Kurotaki; Akihide Haruyama; Masahiro Funahashi; Jun-ichi Hanna

doi:10.1117/12.475447

14 July 2003 Modeling of electronic charge transport in smectic liquid crystals

Akira Ohno, Kensuke Kurotaki, Akihide Haruyama, Masahiro Funahashi, Jun-ichi Hanna

Proceedings Volume 4991, Organic Photonic Materials and Devices V; (2003) https://doi.org/10.1117/12.475447
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States

Abstract

We have investigated the hole transport in smectic mesophases by Monte Carlo simulation based on a 2D hopping transport in Gaussian-distributed density of states and time-of-flight experiments. We found that their unique carrier transport properties such as non-Poole-Frenkel type of behavior i.e., field-and-temperature independent mobility, is well explained by the 2D disorder model with a small Gaussian width of 50-60 meV. Furthermore, we found the Pool-Frenkel type of behavior in a biphenyl derivatives and at a low temperaure range below ambient temperature in a therthiphene derviative and determined the Gaussian width to be 100-120meV and 50 meV, respectively. We came to a conclusion that the charge carrier transport in smectic mesophases can be explained by a 2D disorder model with a small Gaussian width of the density of states σ, where a value of σ/kT plays important role to determien its behavior at a given temperature.

Citation Download Citation

Akira Ohno, Kensuke Kurotaki, Akihide Haruyama, Masahiro Funahashi, and Jun-ichi Hanna "Modeling of electronic charge transport in smectic liquid crystals", Proc. SPIE 4991, Organic Photonic Materials and Devices V, (14 July 2003); https://doi.org/10.1117/12.475447

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