Thermally Stable Binary Optical Films Based on Photocrosslinkable Liquid Crystalline Polymers Containing Azodyes

摘要

We developed thermally stable binary optical films based on azodye-containing liquid crystalline polymers (ACLCPs) through two-step exposure of linearly polarized light with the wavelength of 488 nm together with subsequent exposure for photo-crosslinking by ultraviolet light under nitrogen atmosphere. Our fabricated optical films with two in-plane optic axes showed high thermal durability and little degradation of optical efficiency less than 5 percent at 200 deg C. Due to the large birefringence acquired during the photo-alignment, the binary optical films can be used as a variety of patterned retarders for mobile display applications.