Electro-optical properties of nematic liquid crystal doped with nanoparticles

• Main Authors: Tung-Ho Chen, 陳東河
• Other Authors: 趙治宇
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/10150544245304377861

碩士 === 國立臺灣大學 === 物理研究所 === 94 === Nematic liquid crystal is the most common material for liquid crystal display (LCD). Some papers reported that the electro-optical properties of nematic liquid crystal could be changed with doped nanotubes. Those changes can improve the threshold voltage significantly. We plan to know if doping some different nanoparticles can change electro-optical properties in nematic liquid crystal. We use one commercial liquid crystal material MJ991597 to be our host and doped with nano-diamond powder and nano-TiO2, respectively. The concentrations are 0.1 %, 0.3 % and 0.5% for nano-diamond powder and nano-TiO2 . We measured the transmittance (voltage-transmittance curve), the ion effect (voltage-current curve), and the capacity of the liquid crystal device. We found that nano-dopants could change the electro-optical properties significantly compared with pure MJ991597. From our research, we know that the electro-optical properties can be improved by doping some nanoparticles to decrease the threshold voltage and ion effect. In other word, we can improve the performance of LCD and increase efficiency by doping nanoparticles.