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The thesis focuses on study of optical and photovoltaic properties ofiso-type and aniso-type heterostructures based on photosensitive layers oforganic semiconductors. The primary attention has been paid on determination ofoptimal conditions for preparation of organic thin-film structures of methylsubstituted perylene pigment, hexathiopentacene and SnCl2 phthalocyanine. Thesestructures are perspective for fabrication of photosensitive heterostructuresand can be used for development of effective photoconverters of solar energy.The influence of annealing and substrate temperature during thermal depositionof the films on morphology and surface structure, optical and photovoltaicproperties of thin films of methyl substituted perylene pigment,hexathiopentacene and SnCl2 phthalocyanine was studied. The surface and bulkparameters of considered films were determined from the results obtained here.The photovoltaic and optical properties of organic iso-type and aniso-typeheterostructures prepared on the substrates with different temperatures werestudied. The obtained data for heterostructures were analyzed using Andersonmodel and Van Opdorp model, respectively. This analysis showed that organicaniso-type heterostructures based on methyl substituted perylene pigment andiso-type heterostructures based on pentacene can be described by the modelsproposed and developed for inorganic semiconductor heterojunctions. The optimalconditions were determined for preparation of organic photosensitiveheterostructures, which absorb most part of solar radiation in visible and nearinfrared range, as well as effectively generate and separate charge carriers onthe interface of heterojunction. The aniso-type and iso-type heterostructuresprepared under optimal conditions are perspective elements for development oforganic photoconverters, including organic solar cells.

PhD thesis - 'Electronic Processes at the Interface of Organic Semiconductors'