The elaboration of photosensitive polymeric systems for photonics remains topical on contemporary stage and is of a particular theoretical and practical interest [1]. In this work we present the synthesis and investigations of N-vinylcarbazole copolymers (N-VC) with 4-decylstyrene (4-DS). In the obtained material the N-vinylcarbazole units are responsible for photosensitive properties while the co-polymerized 4-decylstyrene units are responsible for the plasticisation effect. The synthesis of binary copolymers with a variable N-vinylcarbazole content (from 60 to 80 mole%) was realized using free radical polymerization method in the presence of 1 or 2 mole % of initiator (azobisisobutyronitrile), in toluene or tetrahydrofuran, in inert gas atmosphere, in sealed ampoules at 80°C. All copolymers were purified by double precipitation in methanol. The structure of synthesized copolymers was investigated using IR, UV-VIS and 1H NMR spectroscopies and elemental analysis.The N-VC:4-DS copolymers’ thin films were sensitized with 2,4,7-trinitro-9H-fluoren-9-one and other ingredients. The investigation of copolymer films photo-electro conductivity showed performing results (S>10-5J/cm2), especially for the copolymer containing 20 mole% of 4-DS as plasticiser. As it was previously showed [2], phthalocyanines are good agents for the increase of carbazole-containing materials photosensitivity. The introduction of 5-10 % of Zn, Co or Ni tetraoctyloxyphthalocyanine shifts the photosensitivity maximum from 400-600 nm to 800 nm. A double-layered optical information recording media was developed from N-VC:4-DS copolymers. Using the green (λ=532 nm) and red (λ=633 nm) lasers irradiation diffraction gratings with the diffractional eficiency of 10% and resolution R = 1000 - 2000 mm-1 were recorded. [1] Kartujanskiy A.L. Perspectives and possibilities of non-silver photography 1988. [2] Robu Ș., Mitcov D., Dragalina G., Rivaton A., Mailhot B., Bolte M., Dementiev I., Andrieș I. Journal of Non-Crystalline Solids, 2009, 1840-1843.