色素ドープ液晶の分子配向変化を利用した減光フィルムの作製

抄録

Recently, liquid crystals have attracted much attention towards applications for dimming materials because it has large refractive index anisotropy and its molecular orientation can be controlled by an external stimulus, such as electricity and light. In structurally anisotropic dye doped systems, molecular interactions between the liquid crystal molecules and the dye molecule excited at high light intensity cause the molecular reorientation above a light-intensity threshold. In recent years, we have found that the threshold intensity of molecular reorientation is greatly reduced by adding a polymer to the dye-doped liquid crystal. In this study, we fabricated a polymer network dye-doped liquid crystal (PNLC) films in which polymer main chain was crosslinked, and studied molecular reorientation behavior and optical power limiting behavior based on molecular orientation changes in the PNLC films.