Study of the thermal and temperature conditions of flat and inclined lands tekis va qiyalik yerlarning issiqlik va temperatura rejimini o
* GULISTON DAVLAT UNIVERSITETI AXBOROTNOMASI
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11 ГулДУ Ахборотнома 2021 Табиий №1 1
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* GULISTON DAVLAT UNIVERSITETI AXBOROTNOMASI,
Tabiiy va qishloq xo‘jaligi fanlari seriyasi. 2021. № 1 13 molar content of ZnSe reaches its maximum value х = 0.80, which is possibly due to the high saturation of the solution-melt at the crystallization front with zinc selenide. Further, the molar content of ZnSe slowly decreases, reaching the value of х = 0.04 on the near-surface region of the epitaxial film. Since the growth of the epitaxial layer is carried out from a limited volume of the solution-melt and since the solubility of ZnSe is an order of magnitude lower than the solubility of GaAs in tin at the given temperature, then with the growth of the film, after the intense introduction of zinc selenide into the solid phase, the solution-melt is depleted of ZnSe, which leads to further gradual decrease in the molar content of ZnSe in the direction of growth. At the depth of up to 2 μm from the film surface, the molar content of ZnSe does not exceed 10 mol%. Thus, the grown film is the graded-gap substitutional solid solution (GaAs) 1-x (ZnSe) x (0 x 0.80) with a smoothly (but not monotonously) varying composition. A wide-gap layer enriched in ZnSe is formed between the substrate and the near-surface region of the film. Fig. 7. Distribution profile of Ga, As, Zn and Se atoms in the epitaxial layer of the (GaAs) 1- x (ZnSe) x solid solution. Conclusion Thus, in this work, we have shown the possibility of growing an epitaxial layer of the solid solution (GaAs) 1-x (ZnSe) x of molecular substitution. Necessary condition for obtaining such a solid solution is the existence of the components of the solid solution in the liquid solution in the form of molecules, and not in the form of individual atoms, as well as the saturation of the solution-melt with molecules of the components of the solid solution. References: 1. A. Ballabio, S. Bietti, A. Scaccabarozzi, L. Esposito, S. Vichi, A. Fedorov, A. Vinattieri, C. Mannucci, F. Biccari, A. Nemcsis, L. Toth, L. Miglio, M. Gurioli, G. Isella, S. Sanguinetti. Sci. Rep., 9, (2019). doi:10.1038/s41598-019-53949-x 2. M. Feifel, D. Lackner, J. Ohlmann, J. Benick, M. Hermle, F. Dimroth. Sol. RRL, 3, 1900313 (2019). doi:10.1002/solr.201900313 3. A. A. Geldash, V. N. Djuplin, V. S. Klimin, M. S. Solodovnik, O. A. Ageev. J. Phys. Conf. Ser., 1410, 012030 (2019). doi:10.1088/1742-6596/1410/1/012030 4. S. P. Suprun, V. N. Sherstyakov, Е. V. Fedosenko. Epitaksiya ZnSe na GaAs pri ispolzovanii v kachestve istochnika soyidineniya ZnSe. Fizika i texnika poluprovodnikov, 2009, tom 43, vyp. 11, str.1570-1575. 5. Yu. N. Bobrenko, S. Yu. Paveles, А. M. Paveles, N. V. Yaroshenko. Fotoelektricheskie preobrazovateli s varizonnimi sloyami na osnove ZnSe. Fizika i texnika poluprovodnikov, 2013, tom 47, vyp. 10, str.1381-1384. |
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