Simulated carrier transport in smectic mesophase and its comparison with experimental result

Ohno, A.; Hanna, J.
February 2003
Applied Physics Letters;2/3/2003, Vol. 82 Issue 5, p751
Academic Journal
We have investigated charge carrier transport in the smectic mesophases of a liquid crystal, i.e., a 2-phenylnaphthalene derivative, by computational Monte Carlo simulation and time-of-flight experiments. The unique carrier transport properties characterized by field-independent high mobility over 10[sup -3] cm[sup 2]/V s observed is well explained by a two-dimensional hopping model with a Gaussian distribution of density of states. The deviation of Gaussian distribution, small σ, is determined to be 60 meV in the smectic B phase. This model is proven to be valid by demonstrating a predicted Poole-Frenkel-type behavior at the high electric-field region.


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