The peculiarities of the properties of ZnSxSe₁-x nanocrystals obtained by self-propagating high-temperature synthesis

• Опубліковано в: : Functional Materials
• Дата: 2018
• Автори: Kovalenko, A.V., Plakhtii, Ye.G., Khmelenko, O.V.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: НТК «Інститут монокристалів» НАН України 2018
• Теми: Characterization and properties
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/157188
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: The peculiarities of the properties of ZnSxSe₁-x nanocrystals obtained by self-propagating high-temperature synthesis / A.V. Kovalenko, Ye.G. Plakhtii, O.V. Khmelenko // Functional Materials. — 2018. — Т. 25, № 4. — С. 665-669. — Бібліогр.: 15 назв. — англ.

ZnSxSe₁-x nanocrystals of all compounds were obtained by self-propagating high-temperature synthesis. It was found that the obtained samples had dimensions of 55±5 nm and were characterized by a mixed crystalline structure. With increase the x value the fraction of the hexagonal phase in nanocrystals decreased from 65±5 % to 30±5 %, and the fraction of the cubic phase increased in the corresponding ratios. Despite the formation of ZnSxSe₁-x solid solutions, according to RCS data, the local environment of Mn2+ impurity ions is not mixed. At a value of 0.2<x&lq;1, the Mn²⁺ ions were surrounded by sulfur ions, and at x≤0.2 it was surrounded by selenium ions. The change of the Mn²⁺ ions local environment was accompanied by an abrupt change in the value of the RCS hyperfine structure of the Mn²⁺ ions from A = 6.88-6.91 mT to A = 6.55 mT. In ZnSxSe₁-x nanocrystals with x = 1 and x = 0.9, an EPR line with g = 1.9998 was detected, which is associated with an uncontrolled impurity - Cr⁺ ions.