DOI: 10.1002/sdtp.16840 ISSN:
P‐86: Ultrathin High Dichroic Ratio Azo Dye Thin Film Prepared by Photo‐alignment and Its Photostability Enhancement
Yi-Yang Gao, Man-chun Tseng, Yeuk-Lung Ho, Yue-Chu Cheng, Olena Vashchenko, Valerii Vashchenko, Shu-Tuen Tang, Fion Sze-Yan Yeung, Hoi-Sing Kwok- General Medicine
Ultrathin (<200nm) azo dye polarizing film with a high dichroic ratio (over 150) is developed by photo‐alignment methods. Polarizing film prepared by solution‐based process (post‐ photoalignment) and evaporation (in‐situ photo‐alignment) with a family of azo dye materials with slightly different molecular structures is explored. We study the photostability of these azo‐dye films against polarized light. Methods and factors of getting high dichroic ratio and high photostability polarizing films are discussed.