Synthesis and characterization of a low-Tg photorefractive composite

N,N′-Diphenyl-4-biphenylamine-substituted polysiloxane, PSX-bTPA was synthesized and characterized. We also studied the photoconductivity and the photorefractive properties of the polymeric photorefractive composite. The 50 μm thick photorefractive materials containing 30 wt% chromophore showed a diffraction efficiency 67% at 30 V/μm, which corresponded to a speed of 2.6 s.