Characteristics of wide-band reflection of polymer-stabilised cholesteric liquid crystal cell prepared from an unsticking technique

Abstract

An unsticking technique was applied for the fabrication of a polymer-stabilised cholesteric liquid crystal (PSCLC) cell. The template of polymer matrix in the planarly aligned cholesteric liquid crystal (Ch-LC) was perfectly preserved by lifting off the hydrophilic antisticking substrate. The desired PSCLC cell could then be obtained by injecting a third Ch-LC sample between two designed templates of PSCLC layer. By adjusting the pitch distribution in the two stacking templates, a reflectivity of nearly 50% incident light could be yielded and the bandwidth of the reflection spectrum could be controlled accurately in the PSCLC cell. Thus, a method to modulate the wide-band reflection of 50% visible light flux range was offered.

Keywords:

• chiral dopant
• cholesteric liquid crystal
• crosslink
• monomer

Acknowledgements

This work was financially supported by Flat-Panel Display Special Project of China 863 Plan (Grant No. 2008AA03A318), National Science Foundation (Grant No. 20674005) and Projects of Chinese National Science and Tcehnology Tackling Key Problems (Grant No. 2007BAE31B02).