Production of thin film of multicomponent inorganic semiconductors under quasi-equilibrium conditions


  • B. Tsizh Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv, Lviv, Ukraine https://orcid.org/0000-0002-1319-1016
  • Z. Dziamski Kazimierz Wielki University in Bydgoszcz, Bydgoszcz, Poland
Keywords: thin films, semiconductors, technological methods of obtaining, thermal spraying, quasi-equilibrium condi-tions

Abstract

Issues of improving the properties of semiconductor thin film and their reproducibility, as well as improving and reducing the cost of manufacturing technology stimulate research and development of new, advanced methods. Therefore, it is important to optimize the technology of getting reproducible, competitive, high-tech thin films of multicomponent semiconductor compounds with predetermined properties. In the given article it is shown that constructive and technological improvements of a method of thermal spraying in vacuum allow to minimize nonequilibrium conditions of film growth, keeping the advantages of thermovacuum spraying, such as high reproducibility, processability and productivity, a wide range of variations in the synthesis conditions, and, accordingly, the properties of condensates, maximum purity of growth processes, as well as ease of performing and management and cost-effectiveness of the process of getting perfect condensates. For this purpose, we have developed a special construction of a quasi-fusion evaporator and a device for getting semiconductor film in vacuum, as well as a version of a transparent “hot wall”. The resistivity, cross section and geometric dimensions of the cover and the heater of the developed structures were selected so that in the mode of resistive heating of the evaporator temperature gradient due to the difference in their electrical resistance, and, accordingly, the Joule heat of current, in the temperature range 673… 1473 K provided the temperature of the cover 1.1 ... 1.3 times higher than the temperature of the heater. Due to the elevated temperature of the cover, the solid fraction is either repelled on the sublimating (evaporating) surface and the walls of the crucible, or undergoes sublimation (evaporation) from the surface of the cover. Depending on the values of the sputtering rate, the grain size of semiconductor polycrystalline film varied from units of nanometers to several micrometers. Crystallinely ordered films were got at relatively low values of the sputtering rate (0.5...5 nm·s-1). It was set up the technological conditions for getting thin films of multicomponent semiconductors, which ensure the independence of the chemical composition of condensates from the evaporation rate in the wide range from 0.05 to 20 nm·s-1, uniform composition of the gas phase during sublimation, absence of inhomogeneous solids in  films, wide range properties of condensates and their high reproducibility.

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Tsizh, B., & Dziamski Z. (2019). Technological Methods of Forming Thin Semiconductor Layers. Part 1. Scien-tific Messenger LNUVMB. Series: Food Technologies, 21(91), 20–24. DOI: 10.32718/nvlvet-f9104.

Tsizh, B., & Dziamski, Z. (2019). Technological Methods of Forming Thin Semiconductor Layers. Part 2. Scien-tific Messenger LNUVMB. Series: Food Technologies, 21(92), 3–7. DOI: 10.32718/nvlvet-f9201.

Tsizh, B. &Dziamski, Z. (2020). Technological Methods of Forming Thin Semiconductor Layers. Part 3. Scien-tific Messenger LNUVMB. Series: Food Technologies, 22(93), 15–17. DOI: 10.32718/nvlvet-f9303

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Published
2022-06-28
How to Cite
Tsizh, B., & Dziamski, Z. (2022). Production of thin film of multicomponent inorganic semiconductors under quasi-equilibrium conditions. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Food Technologies, 24(97), 3-8. https://doi.org/10.32718/nvlvet-f9701