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Browsing by Author "Yang, Shun-Yi"

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    Recovery of UV-degraded electrical properties of nematic liquid crystals doped with TiO2 nanoparticles
    (2016-06)
    Wu, Po-Chang
    ;
    Yang, Shun-Yi
    ;
    Lee, Wei
    ;
    影像與生醫光電研究所
    ;
    光電工程學系
    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.