http://dspace.nbuv.gov.ua:80/handle/123456789/114483 2026-04-13T12:50:48Z http://dspace.nbuv.gov.ua:80/handle/123456789/117768 Lateral drift of photo-generated charge carriers in the p-SiGe/Si heterostructures with quantum wells Gudenko1, Yu.M.; Vainberg, V.V.; Poroshin, V.M.; Tulupenko, V.M. The drift of charge carriers in the p-Si₀.₈₈Ge₀.₁₂/Si heterostructures under strong lateral electric fields and conditions of carrier generation by the band-to-band light absorption has been investigated experimentally. The data of the drift length, drift mobility, and lifetime of charge carriers within the temperature range 20 to 77 K under the electric field up to 1500 V/cm are presented. 2011-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/117767 Multi-element gas sensor based on surface plasmon resonance: recognition of alcohols by using calixarene films Kostyukevych, K.V.; Khristosenko, R.V.; Shirshov, Yu.M.; Kostyukevych, S.A.; Samoylov, A.V.; Kalchenko, V.I. This work is devoted to development of a multi-element gas sensor based on surface plasmon resonance (SPR) to recognize some alcohols. As sensitive layers capable to change their optical properties when interacting with volatile alcohol molecules, we investigated bulk-porous sorbents – calixarenes (tret-butyl-calix[4,6,8]arenes (С[4]А, С[6]А, С[8]А), tetra-amyl-calix[4] resorchinolaren (C[4]Re). Each calixarene was studied to obtain its kinetic concentration SPR characteristics for interaction with ethanol, isopropanol and penthanol vapors. To realize SPR measurements, the sensitive calixarene films (d ∼ 100 nm) were deposited on a gold film (d ∼ 45 nm) by using the method of thermal evaporation in vacuum. Experimental multi-element SPR device was designed as based on the analysis of TV image obtained for the studied array of calixarene films and tested using saturated ethanol vapors. 2011-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/117766 Jones-matrix images corresponding to networks of biological crystals for diagnostics and classification of their optical properties Ushenko, Yu. O.; Balanetsk, V. O.; Angelsky, O. P. Performed in this work is a complex statistical, correlation and fractal analysis of coordinate distributions for Jones-matrix elements describing birefringent networks observed in the main types of human amino acids. Determined are the values and ranges for changing the statistical, correlation and spectral moments of the 1-st to 4-th orders that characterize Jones-matrix images of these biological polycrystalline protein structures. We have ascertained objective criteria for classification and differentiation of optical properties inherent to polycrystalline networks of amino acids with different types of spatial symmetry – dendrite, spherolite and cluster ones. 2011-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/117765 The role of copper in bifacial CdTe based solar cells Khrypunov, G.; Meriuts, A.; Shelest, T.; Deineko, N.; Klyui, N.; Avksentyeva, L.; Gorbulik, V. We present an innovative back contact for CdTe solar cell by the application of a transparent conducting oxide, typically ITO, as a back electrical contact on CdTe/CdS photovoltaic devices that acts as a free-Cu stable back contact and at the same time allows to realize bifacial CdTe solar cells, which can be illuminated from either or both sides. The controlled insertion of a very limited amount of copper into the ITO back contact permits to have reproducible devices with high efficiencies still keeping the bifacial configuration. Thin CdTe layer solar cells with ITO back contact have been realized with efficiencies exceeding 10%, the reduced thickness of CdTe allows to have a better performance on the back-side illumination and reduces the amount of CdTe material. 2011-01-01T00:00:00Z