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Information × Registration Number 0211U006641, 0109U001414 , R & D reports Title Nanomaterials of AIVBVI semiconductor compounds for electronic technology devices of new generation. popup.stage_title Head Freik Dmytro Myhaylovych, Registration Date 02-03-2011 Organization Precarpathian university named after Vassyl Stefanyk popup.description2 It is revealed by the using atomic-force scanning microscopy that the basic growth mechanisms are the formation of some three-dimensional pyramidal nanostructures (Folmer-Weber mechanism); combined 2D-layer growth plateau (Frank Van der Morve mechanism) and 3D-structures. It is shown that the dominant mechanism of carriers scattering is diffuse scattering on the surface in PM-1/PbTe nanostructures, and diffuse scattering on the surface and grain boundaries in (0001) STA / SnTe nanostructures. It is established that the dependences of transport coefficients from time t of exposition of PbTe films in air are explained by the simple two-carrier model that takes into account the diffusion processes of oxygen and vacancies of lead to the surface. If in PbTe thin films oxygen replaces vacant places of tellurium only in the initial stages of their exposition in air, and the predominant process is the diffusion of vacancies of lead to the surface, in thick films this process can be neglected and the interaction with oxygen can be considered only. For thick films diffusion processes positively influence on the thermoelectric power factor, increasing its value. It is shown that the combination of two-carrier model with diffusion processes is allowed to evaluate the contribution to the electrical parameters of electrons and holes separately, which is useful in such studies. The technological factors that provide predefined structural and electrical characteristics required for specific uses in electronic technology devices of new generation: thermoelectric micromodules for cooling devices, nanolasers in the infrared spectrum are specified. Product Description popup.authors Горічок Ігор Володимирович Дундза Богдан Степанович Межиловська Любов Йосипівна Прокопів Володимир Васильович Соколов Олександр Пеонідович popup.nrat_date 2020-04-02 Close