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Information × Registration Number 0223U002068, 0120U102320 , R & D reports Title Transformation of the optic-electronic parameters and structure of new crystalline materials for sensor devices and optoelectronic popup.stage_title Head Stadnyk Vasyl Yo., Доктор фізико-математичних наук Registration Date 07-02-2023 Organization Ivan Franko National University of Lviv popup.description2 Crystals of lithium-ammonium sulfate with manganese admixture, lithium-sodium sulfate, and rubidium sulfate were synthesized; their structure, atomic coordinates and parameters of the unit cell were specified. It was established that the introduction of an impurity causes: a decrease in the volume of the unit cell; change in absolute values of coefficients of thermal expansion; shift of the phase transition towards lower temperatures. The band-energy structure of the studied crystals was calculated and the peculiarities of the formation of energy bands were established. Baric-spectral dependences of birefringence of potassium sulfate crystals with an admixture of copper ions were studied; the value of elasto-optical coefficients was calculated; the estimated maximum values of the acousto-optic interaction coefficient of crystals allow their use for acousto-optic modulation of ultraviolet radiation. On the basis of experimental studies, devices for measuring temperature and pressure are proposed. Product Description popup.authors Antonyak Oleg T. Bovhyra Oleh V. Brezvin Ruslan S. Horon Bohdan I. Kildiyarov Roman O. Karnaushenko Vladyslav O. Karpliuk Lidiya T. Kushnir Oleh S. Matviiv Roman Nastyshyn Sviatoslav Yu. Rudysh Myron Ya. Shveydihula Vitaliy V. Shchepanskyi Pavlo A. Yakibchuk Petro M. popup.nrat_date 2023-02-07 Close