Abstract
The conditions of the epitaxial growth of high-quality relaxed Si1–x Ge x layers by the combined method of the sublimation molecular-beam epitaxy and vapor-phase decomposition of monogermane on a hot wire are considered. The combined growth procedure proposed provides a means for growing Si1–x Ge x layers with a thickness of up to 2 µm and larger. At reduced growth temperatures (T S = 325–350°C), the procedure allows the growth of Si1–x Ge x layers with a small surface roughness (rms ≈ 2 nm) and a low density of threading dislocations. The photoluminescence intensity of Si1–x Ge x :Er layers is significantly (more than five times) higher than the photoluminescence intensity of layers produced under standard growth conditions (T S ≈ 500°C) and possess an external quantum efficiency estimated at a level of ~0.4%.
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Original Russian Text © V.G. Shengurov, V.Yu. Chalkov, S.A. Denisov, S.A. Matveev, A.V. Nezhdanov, A.I. Mashin, D.O. Filatov, M.V. Stepikhova, Z.F. Krasilnik, 2016, published in Fizika i Tekhnika Poluprovodnikov, 2016, Vol. 50, No. 9, pp. 1270–1275.
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Shengurov, V.G., Chalkov, V.Y., Denisov, S.A. et al. Conditions of growth of high-quality relaxed Si1–x Ge x layers with a high Ge content by the vapor-phase decomposition of monogermane on a sublimating Si hot wire. Semiconductors 50, 1248–1253 (2016). https://doi.org/10.1134/S1063782616090220
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DOI: https://doi.org/10.1134/S1063782616090220