抄録
The two succinates containing tetraphenyldiaminobiphenyl (TPD) or tetraphenylphenylenediamine (PDA) unit as a charge transporting moiety and dicyanovinylaniline unit as an electro-optical (EO) chromophore were prepared. Synthesized succinates (TPD-2DCVA, and PDA-2DCVA) show glass transition and form stable amorphous molecular glass at room temperature without a polymer binder or a plasticizer. TPD-2DCVA doped with 0.2 wt% of fullerene shows 28% of diffraction efficiency, and 110 cm-1 of coupling gain at 55V/μm, while PDA-2DCVA shows no photorefractivity at room temperature probably due to the difficulty of orientation of EO moiety because of higher glass transition temperature. The diffraction efficiency of TPD-2DCVA significantly increased by the addition of 0.5 wt % of PDA-2DCVA, which might be due to the increase of trap density. Fast response, observed for TPD-2DCVA, was ascribed to the large photoconductivity.
