Abstract
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.
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