Screening effect of a-C:H alignment layer in nematic liquid crystal cell

  • E. A. Konshina
  • E. O. Gavrish


The electrical and optical characteristics of nematic liquid crystal (NLC) cells and their dependence on the thickness of an amorphous hydrogenated carbon (a-C:H) alignment layer have been studied. An increase in the a-C:H layer thickness favors enhancement of the screening of a bias voltage applied to this layer, which is manifested by an increase in the threshold voltage of the electrooptical splay effect. This is accompanied by a decrease in the initial (pretilt) director angle, which is evidence for an increase in the anchoring energy due to the field of space charge localized at the interface.


Liquid Crystal Nematic Liquid Crystal Liquid Crystal Cell Liquid Crystal Molecule Liquid Crystal Layer 
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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  1. 1.St. Petersburg State University of Information Technologies, Mechanics, and OpticsSt. PetersburgRussia

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