Carbazole-based azo group-containing single component polymer exhibiting photorefractive performance

Carbazole-based azo group-containing bi-functional photorefractive polymers were synthesized through a post-azo-coupling reaction. It was found that the single component polymer exhibited good photorefractive (PR) performance without adding any sensitizers and plasticizers. It was composed of a hole-transporting carbazole group and an azobenzene chromophore attached via post-azo-coupling reaction. The better PR performance compared to a bi-functional polymer with a short spacer between the functional group and polymer backbone was attributed to the enhanced free rotation of the second-order chromophore through the more flexible spacer.Materials Science, MultidisciplinarySCI(E)EI13LETTER113783-37853