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A new bifunctional photorefractive active succinate (TPD-2DCVA) consisting of a tetraphenyldiaminobiphenyl (TPD) unit and 4-dicyanovinylaniline (DCVA) moieties was prepared, which forms stable molecular glass. The glass-transition temperatures (Tg's) of TPD-2DCVA-based composites were efficiently controlled by the doping of small amount of plasticizers. The compound possesses a high photoconductivity of 2.1 © 10-9 cmΩ-1W-1 at 50Vµm-1. A gain coefficient of 56.7 cm-1 at electric field of 56Vµm-1 was achieved. Fast response times of 29-37 ms were also obtained at low electric fields for these composites. [ABSTRACT FROM AUTHOR]