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The electric conduction and photoconduction of sandwich-type poly-N-epoxypropylcarbazole (PEPC) and 3, films containing 33 wt.% of the dye 1,8-naphthoylene-1 ′ ,2 ′ -benzimidazole (NBI) have been investigated. It has been established that the PEPC films, as compared to the 3,6-di-Br-PEPC films, have a higher electric conduction and a lower photosensitivity and an electric field exerts a stronger quenching effect on the photoluminescence of the first-mentioned films. Analysis of the voltampere and lux-ampere characteristics and the kinetics of electric conduction of these films has shown that the space charge and recombination via dye molecules in them influence their electric conduction and photoconduction. The volume recombination of charges is radiative in character.Introduction. In designing active optical information media based on polymer composites possessing photosemiconductor properties, it is necessary to select their components such that charge-carriers (holes and electrons) could be transported under the action of an external electric field. In these systems, charge carriers can be formed by injection of charges into films from contacts or by exposure of them to a radiation acting on the photogeneration centers, as which organic dyes can serve [1,2]. It is important to correctly select dyes serving as the recombination centers in optical-data representation systems based on electroluminescent materials [3,4]. A number of requirements are imposed on the dyes used in the above-mentioned media and materials. These dyes should possess a number of valuable physicochemical and spectral properties that would allow them to provide an effective transport of charge carriers and have a large extinction ratio and a high quantum yield of photoluminescence in the visible or near-IR regions of the spectrum.The aim of the present work is to investigate the spectral and photophysical characteristics of new, onelayer, composite polymer films based on photosemiconductors and organic dyes satisfying the above-indicated requirements and, accordingly, providing high electrical conduction and photoconduction and possessing electro-and photoluminescence.Investigation Objects and Experimental Procedure. We investigated the spectral characteristics as well as the electrical conduction and photoconduction of poly-N-epoxypropylcarbazole (PEPC) and 3,6-di-Br-poly-Nepoxypropylcarbazole (3,6-di-Br-PEPC) films containing 33 wt.% of the dye 1,8-naphthoylene-1 ′ ,2 ′ -benzimidazole (NBI)

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