Ion generation in liquid crystals under electric field

Permittivity dispersion and transient current profiles of two classes of li quid crystal substances were analyzed, providing an idea of probable mechan isms of ion generation. Due to the strong local field caused by the electri c double layers by ions, Schottky injection at electrodes can play an impor tant role even under a small DC voltage application. In a higher voltage re gion, the dissociation of ion pairs and the recombination of free ions can be the dominant mechanisms, resulting in the Ohmic behavior of the voltage dependence of a steady-state current. Understandings of those mechanisms wi ll be of a great help for development of advanced liquid crystal materials for uses in sophisticated displays.