Studies on the Polymer Concentrations effect in the Electro-optic Properties of the Bistable Polymer-stabilized Cholesteric Texture

• Main Authors: Zeng, Yao-De, 曾耀德
• Other Authors: Pan, Ru-Pin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/09775546788117196910

碩士 === 國立交通大學 === 電子物理系所 === 99 === We mix nematic liquid crystal with chiral materials and control the concentration to reach cholesteric liquid crystal texture. In order to stable the texture of cell, the cholesteric liquid crystal has been mixed with monomer and polymerized the monomer by UV lamp. After the process of polymerization finished, this cell is called “polymer stabilized cholesteric liquid crystal texture” or PSCT. In this work, the PSCT cells show bistable property and reflects specific wavelength. Then, we study the polymer concentration effect in the Eletro-optic properties. We have also studied the effects caused by polymerization time, polymerization intensity, and the concentration of photoinitiator. According to the experimental results, we find that the higher polymer concentration and polymerization intensity used, the less reflectance and transmittance we get , but the response time is much faster.