Verbyts'kyj A. Gas Effect on Photoelectrical Processes in Organic Structures Based on Phthalocyanines.

The dissertation is devoted to the investigation of different gases (oxygen, ethanol vapor, ammonia) effect on properties of the interface between metals or inorganic semiconductors with different polymorphs of non-flat phthalocyanines (lead, vanadyl and titanyl) and to the study of polymorphism influence on charge transfer states. A few modern experimental methods, in particular modulation spectroscopy, and computer system of data collection and recording were used. Main results: 1) Parameters of CT-states energetic structure were determined for non-flat phthalocyanines; 2) It is shown that change of short circuit photocurrent is described by generalized adsorption formula Isc = Ap0.5/(1+bp0.5), where p is oxygen partial pressure; A, b are constants; 3) The mechanism of phthalocyanines interaction with donor gas has been proposed. It includes two simultaneous processes: neutralization of acceptor complexes by donor gas molecules and formation of donor type complexes. Results obtained can be used for t he technology optimization of electronic devices based on phthalocyanines producing. Besides directions of sensitivity and selectivity improvement were proposed for sensors based on organic barrier structures. Possible fields of results application are optoelectronics, power saving and environmental protection.