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河北工业大学 应用物理系, 天津 300401
[ "高文慧(1997—),女,河北沧州人,硕士研究生,2020年于河北民族师范学院获得学士学位,主要从事液晶材料与液晶器件等方面的研究。E-mail: 2059978898@qq.com" ]
[ "孙玉宝(1975—),男,河北沧州人,博士,教授,2010年于河北工业大学获得博士学位,主要从事液晶器件物理和液晶的新型应用等方面的研究。E-mail:sun_yubao@163.com" ]
收稿日期:2022-05-12,
修回日期:2022-06-05,
纸质出版日期:2022-08-05
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高文慧, 郭瑞彩, 李小帅, 等. 聚合物稳定胆甾相液晶的低压致反射带隙展宽[J]. 液晶与显示, 2022,37(8):997-1007.
Wen-hui GAO, Rui-cai GUO, Xiao-shuai LI, et al. Reflection band gap broadening of polymer-stabilized cholesteric liquid crystal by low voltage[J]. Chinese journal of liquid crystals and displays, 2022, 37(8): 997-1007.
高文慧, 郭瑞彩, 李小帅, 等. 聚合物稳定胆甾相液晶的低压致反射带隙展宽[J]. 液晶与显示, 2022,37(8):997-1007. DOI: 10.37188/CJLCD.2022-0164.
Wen-hui GAO, Rui-cai GUO, Xiao-shuai LI, et al. Reflection band gap broadening of polymer-stabilized cholesteric liquid crystal by low voltage[J]. Chinese journal of liquid crystals and displays, 2022, 37(8): 997-1007. DOI: 10.37188/CJLCD.2022-0164.
胆甾相液晶(CLC)的反射带隙通常在50~100 nm之间,为增强胆甾相液晶的实用性,可通过施加外部刺激拓宽其反射带隙。具有负介电各向异性的聚合物稳定胆甾相液晶(PSCLC)在直流电压作用下聚合物网络会发生运动,导致反射带隙展宽,而此过程通常需要较大的驱动电压。本文研究了聚合物单体浓度、液晶盒厚度和紫外吸收染料含量对反射带隙展宽程度的影响,制备得到的PSCLC反射带隙最高可实现3倍展宽效果,所需驱动电压低至7.5 V,且撤掉驱动电压后,PSCLC系统会迅速恢复其原始光学特性,呈现出良好的可逆性变化。
The reflection band gap of cholesteric liquid crystal (CLC) is usually between 50 and 100 nm. To enhance the usefulness of CLC, the external stimulation can be applied to broaden the reflection bad gap. The polymer network can be moved by the action of direct current voltage in polymer-stabilized cholesteric liquid crystal (PSCLC) with negative dielectric anisotropy, results in broadening the reflection band gap, which is usually driven by a large voltage. In this paper, the influence of polymer monomer’s concentration, cell thickness of liquid crystal, and ultraviolet absorption dye on the reflection band was studied. The reflection band of PSCLC is broadened by 3 times, and the required driving voltage is lowered to 7.5 V. After the driving voltage is removed, PSCLC system quickly returns to the original optical performance, shows the good reversible change.
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