Regularities of composition changes of silicon/germanium alloy thin films formed on a single-crystalline silicon substrate by electrochemical deposition of germanium into a porous silicon matrix with subsequent rapid thermal annealing (RTA) at temperatures of 750–950°C are studied. An analysis of the samples by Raman spectroscopy showed that an increase of the RTA temperature leads to a decrease in the germanium concentration in the formed film. A decrease of the RTA duration at a given temperature makes it possible to obtain films with a higher germanium concentration and to control the composition of thin silicon/germanium alloy films formed by changing the RTA temperature and duration. The obtained results on controlling the composition of silicon/germanium alloy films can be used to create functional electronic devices, thermoelectric power converters, and optoelectronic devices.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 89, No. 5, pp. 614–620, September–October, 2022. https://doi.org/10.47612/0514-7506-2022-89-5-614-620.
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Chubenko, E.B., Grevtsov, N.L., Bondarenko, V.P. et al. Raman Spectra of Silicon/Germanium Alloy Thin Films Based on Porous Silicon. J Appl Spectrosc 89, 829–834 (2022). https://doi.org/10.1007/s10812-022-01432-3
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DOI: https://doi.org/10.1007/s10812-022-01432-3