Holographic recording media based on polymer compositions with Fe2O3, ZnO, and CdS nanoparticles

We investigated the influence of additions of Fe2O3, ZnO, and CdS nanoparticles in films of holographic recording media based on photosemiconductors (oligomers and co-oligomers of glycidyl carbazole) and a dielectric (copolymer of styrol with octylmethacrylate) that contain an organic compound with intramolecular charge transfer as a sensitizer of photoconductivity in the visible and near-IR regimes on their photoconducting and thermoplastic properties. The photoconduction current for light wavelengths larger than the red boundary of absorption of the nanoparticles is determined by the photogeneration of charge carriers from the sensitizer molecules and by their transport inside and between nanoparticles. The increase in the photosensitivity of films on addition of nanoparticles is attributed to the appearance of an additional channel for the transport of the electrons generated from the photogeneration centers. A new difference between the rheological properties of the films based on organic photosemiconductors and dielectrics has been revealed.