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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN 印刷: 0040-2508
ISSN オンライン: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v78.i8.70
pages 715-723

DEFECT FORMATION MECHANISMS OF ZINC SELENIDE LAYERS DOPED BY ISOVALENT IMPURITIES OF THE II GROUP

Victor P. Makhniy
Yuri Fedkovych Chernivtsi National University, 2 Kotsyubynsky St., Chernivtsi, 58012, Ukraine
M. M. Berezovskiy
Yu. Fedkovych Chernivtsy National University, 2 Kotsubynsky St, Chernivtsy, 58012, Ukraine
O. V. Kinzerska
Yuri Fedkovych Chernivtsi National University, 2 Kotsyubynsky St., Chernivtsi, 58012, Ukraine

要約

The paper discusses the mechanisms of defect formation in melt zinc selenide crystals doped with isovalent impurities of the second group of the Periodic Table. An analytical calculation of the concentrations of equilibrium point defects was carried out by the method of quasichemical reactions using the concepts of electronegativity and effective charge. It has been established that the dominant defects in the doped material are singly charged vacancies of zinc V'Zn and selenium V·Se, as well as singly charged interstitial selenium Se'i. It is shown that the increase in doping temperature Ta from 373 to 1237 K causes se increase of acceptor centers number (V'Zn and Se'i) and decrease of concentration of donor ounces V·Se however, the conductivity of doped substrates at 300 K remains a hole in the whole range of change Ta. At Ta = 373 K the estimated concentration of free holes is ~1019 cm-3 and satisfactorily consistent with the value p determined from the temperature dependence of the layer resistance ZnSe:Ca.

参考

  1. Kylchutskiy, N.A. and Naymov, A.V., (2014) , Modern optoelectronic devices based on zinc selenide, Nanoinjeneriya, 11, pp. 19-27, (in Russian).

  2. Georgobiani, A.N. and Sheikman, N.K., (1986) , Fizika Soidineniy АIIВVI, Moscow, Russia: Nauka, 320 p., (in Russian).

  3. Makhniy, V.P., (2014) , Physics and Chemistry of Point Defects in Semiconductors, Chernivtsi, Ukraine: Chernivtsi National University, 216 p., (in Ukrainian).

  4. Dmitrieva, Yu.N., Ryzhikov, V.D., and Galchinetsky, L.P., (1990) , Thermodynamics of Isovalent Doping of Semiconductor Compound Crystals А<sup>II</sup>В<sup>VI</sup>, Kharkiv, Ukraine: VNII Monocrystals, 50 p., (in Russian).

  5. Tkachenko, I.V., (2005) , Mechanisms of defect formation and luminescence in homogeneous and doped telurium crystals of zinc selenide, Dis .... Cand. Phys.-Math. Sciences, Chernivtsi, Ukraine, 132 p., (in Ukrainian).

  6. Makhniy, V.P., Hermann, I.I., and Bodyul, G.I., (2016) , Method for obtaining CdTe layers with hole conductivity, Patent of Ukraine for utility model UA201510124, Bulletin №. 10, (in Ukrainian).

  7. Capper, P., (1994) , Properties of Narrow Gap Cadmium Based Compounds, INSPEC, the Institution of Electrical Engineers London, United Kingdom, 597 p.

  8. Kurylenko, O.D., (1974) , Quick Reference Book on Chemistry, Kyiv, Ukraine: Scientific Opinion, 991 p., (in Russian).

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