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Optical Properties of Si Layers Hyperdoped with Se: Effects of Laser and Thermal Treatment

https://doi.org/10.47612/0514-7506-2023-90-2-266-274

Abstract

Silicon layers with a selenium impurity concentration of up to 1021 cm3, which exceeds the equilibrium solubility limit of this impurity in silicon by 4 orders of magnitude, have been obtained by high-dose ion implantation followed by pulsed laser annealing at pulse energy densities from 0.5 to 2.5 J/cm2. The Rutherford backscattering of He+ ions showed that, after laser annealing, up to 70% of the implemented impurity atoms are localized at the sites of the silicon crystal lattice. The Si layers hyperdoped with selenium are characterized by increased (up to 45–55%) absorption in the spectral range of 1100–2400 nm. After thermal heat treatment (550 °C, 30 min + 850 °C, 5 min), no increase in IR absorption was found in comparison with the initial silicon. It was explained by the loss of Se as a result of diffusional redistribution. The theoretical evaluation of recrystallization processes of silicon layers amorphized by Se ions as well as dopants redistributions at the equilibrium thermal treatment was done.

About the Authors

F. F. Komarov
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University
Belarus


L. A. Vlasukova
Belarusian State University
Belarus

Minsk



О. V. Milchanin
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University
Belarus

Minsk



I. N. Parkhomenko
Belarusian State University
Belarus

Minsk



Y. Berencen
Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research
Germany

Dresden



A. E. Alzhanova
N. N. Gumilev Eurasian National University
Kazakhstan

Astana



T. Wang
Maria Curie-Skłodowska University
Poland

Lublin



J. Ƶuk
Maria Curie-Skłodowska University
Poland

Lublin



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Review

For citations:


Komarov F.F., Vlasukova L.A., Milchanin О.V., Parkhomenko I.N., Berencen Y., Alzhanova A.E., Wang T., Ƶuk J. Optical Properties of Si Layers Hyperdoped with Se: Effects of Laser and Thermal Treatment. Zhurnal Prikladnoii Spektroskopii. 2023;90(2):266-274. (In Russ.) https://doi.org/10.47612/0514-7506-2023-90-2-266-274

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ISSN 0514-7506 (Print)