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Original Articles

Polymer and azo-dye composite: a photo-alignment layer for liquid crystals

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Pages 1465-1472 | Received 16 Mar 2014, Accepted 16 May 2014, Published online: 16 Jun 2014
 

Abstract

In this article, we disclose a method to fabricate polymer-stabilised azo-dye photo alignment layers for liquid crystal. The idea includes the introduction of polymer network in the alignment layer, in optimal concentration, followed by two-step irradiation. The stabilised photo-alignment layer has been explored for different aspects of the display-related parameters, viz. anchoring energy, stability for various display-related environments as a function of concentration of monomer and irradiation, residual DC and voltage holding ratio. The composite photo-alignment layer offers well-suited parameters for the liquid crystal alignment and therefore could find application in a variety of modern photonic and display devices.

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