Photo- and electro-isomerization of azobenzenes based on polymer-dispersed liquid crystals doped with azobenzenes and their applications

Yen Chen Liu, Ko Ting Cheng, Hsin Fu Chen, Andy Ying Guey Fuh

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report the photo-isomerization and electro-isomerization effects in azobenzenes-doped polymer-dispersed liquid crystals during the switching of the liquid crystal (LC) device between transparent (cis-isomers dominant) and scattering states (trans-isomers dominant). The isothermal phase transition, which is a result of the illumination of UV light and the application of DC voltage, was the main mechanism to switch the LC device between transparency, scattering, and gray scales. This study discusses in detail the variations in the population of cis-isomers as functions of the period and the amplitude of the applied DC voltage.

Original languageEnglish
Pages (from-to)4404-4411
Number of pages8
JournalOptics Express
Volume22
Issue number4
DOIs
StatePublished - 24 Feb 2014

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