Browsing by Author "Cherpak, V."
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Item Circuit design for development of PH-sensors(Видавництво Львівської політехніки, 2012) Stakhira, P.; Cherpak, V.; Barylo, G.; Kremer, I.; Kus, N.; Boiko, O.A circuit design of pH-sensors based on polyaniline films is proposed.Item Electroluminescence properties of ZnO/Alq3/pegde/Al structure(Видавництво національного університету „Львівська політехніка”, 2009) Hotra, Z.; Stakhira, P.; Volynyuk, D.; Cherpak, V.; Luka, G.; Godlewski, M.; Guziewicz, E.; Pakhomov, G.; Tsizh, B.Item Electrooptical characteristics of the novelty system: ionic doped liquid crystal - conductive polymer(Видавництво Національного університету «Львівська політехніка», 2004) Mykytyuk, T.; Aksimentyeva, O.; Stakhira, P.; Cherpak, V.; Fechan, A.; Konopelnik, O.; Fomenko, V.; Hlushyk, I.Taking into account that ionic-doped liquid crystals are conductive and the conductance depends on dopant concentration, we suggested using ionic-doped liquid crystals as a electrolytic medium in a described configuration of cell. The application of an ionic doped liquid crystal as electrolytic medium in electrochromic device were investigated. Polyaniline is a conductive polymer and has electrochromic effect in an electrolytic medium under the applied voltage. The spectral investigation of the electrohromic effect of polyaniline was carried out in a new cell. The spectral dependences of such structure were presented on paper. An appearance of electrochromic effect was observed in a structure SnO2 – liquid crystal – polyaniline - SnO2.Item ZnMgO:Al anode layer for organic light emitting diode based on carbazole derivative(Видавництво Львівської політехніки, 2012) Luka, G.; Volyniuk, D.; Tomkeviciene, A.; Simokaitiene, J.; Grazulevicius, J. V.; Stakhira, P.; Cherpak, V.; Sybilski, P.; Witkowski, B. S.; Godlewski, M.; Guziewicz, E.; Hotra, Z.; Hotra, O.We demonstrate the fabrication and properties of an near ultraviolet organic light emitting diode (UV OLED) that contains 2,7-di(9-carbazolyl)-9-(2-ethylhexyl)carbazole organic emitting layer and aluminumdoped magnesium zinc oxide (ZnMgO:Al) layer as transparent electrode. The obtained ZnMgO:Al layer is transparent for the wavelengths longer than 325 nm and has low resistivity of the order of 10-3 cm. The UV OLED device turns on at the applied voltage of 9 V.