Chinese Journal of Liquid Crystals and Displays, Volume. 36, Issue 8, 1075(2021)

Modulation of reflection band in polymer-stabilized cholesteric liquid crystals by changing DC electric field direction

ZHANG Xin-min1,2、*, LU Hong-bo1, WANG Qi1,2, WANG Cang-yu1,2, XU Miao1, ZHU Jun1, and QIU Long-zhen1
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  • 1[in Chinese]
  • 2[in Chinese]
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    Cholesteric liquid crystals with broadband reflection properties have a wide range of applications in many fields. In order to expand the method of modulating the reflection band and achieve band modulation in the desired spectral range, a new polymer-stabilized cholesteric liquid crystal device with polymer network gradient distribution is prepared by adding UV-absorbing dyes. The experimental results show that the gradient distribution of polymer network makes a significant difference in the elasticity of polymer network near the upper and lower surfaces of the cell, so that its electrically induced reflection band broadening can be tuned by changing the direction of the direct current electric field. When the cell thickness is 40μm and the dye concentration is 1.2% of PSCLC, the reflective band facing the light source as the positive pole is located at 570~778 nm when a 12 V DC electric field is applied, and the reflective band is red-shifted to 598~816 nm after changing the electric field direction. This research provides a new strategy for broadband reflective cholesteric liquid crystal materials that have potential applications in smart windows, laser protection, data storage, etc.

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    ZHANG Xin-min, LU Hong-bo, WANG Qi, WANG Cang-yu, XU Miao, ZHU Jun, QIU Long-zhen. Modulation of reflection band in polymer-stabilized cholesteric liquid crystals by changing DC electric field direction[J]. Chinese Journal of Liquid Crystals and Displays, 2021, 36(8): 1075

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    Paper Information

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    Received: Mar. 8, 2021

    Accepted: --

    Published Online: Sep. 4, 2021

    The Author Email: ZHANG Xin-min (1215064540@qq.com)

    DOI:10.37188/cjlcd.2021-0061

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