Title: Recovery of UV-degraded electrical properties of nematic liquid crystals doped with TiO2 nanoparticles
Authors: Wu, Po-Chang
Yang, Shun-Yi
Lee, Wei
Institute of Imaging and Biomedical Photonics
Department of Photonics
Keywords: Nematic liquid crystals;Nanoparticles;Ion-trapping;Voltage holding ratio
Issue Date: Jun-2016
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/cm(2) 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. (c) 2016 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.molliq.2016.02.029
ISSN: 0167-7322
DOI: 10.1016/j.molliq.2016.02.029
Volume: 218
Begin Page: 150
End Page: 155
Appears in Collections:Articles