Recovery of UV-degraded electrical properties of nematic liquid crystals doped with TiO2 nanoparticles

Po Chang Wu, Shun Yi Yang, Wei Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The effect of ultraviolet (UV) exposure on the electrical properties of nematic liquid crystal (LC) doped with TiO2 nanoparticles was investigated. The low-frequency dielectric data indicate that the ion-trapping ability of TiO2 descends under UV exposure and that it gradually revives after the removal of the UV light. The voltage holding ratio of the TiO2-doped LC cells, which decreased from 71% to 43% by 2-mW/cm2 UV irradiation for 60 min, remarkably recovered to 61% within 180 min. The proposed LC/TiO2 suspension holds promise for the use of outdoor LC devices characterized by regained excellence in electrical performance after UV exposure.

Original languageEnglish
Pages (from-to)150-155
Number of pages6
JournalJournal of Molecular Liquids
Volume218
DOIs
StatePublished - 1 Jun 2016

Keywords

  • Ion-trapping
  • Nanoparticles
  • Nematic liquid crystals
  • Voltage holding ratio

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