Low Temperature Physics: 43, 636 (2017); https://doi.org/10.1063/1.4986450
Fizika Nizkikh Temperatur: Volume 43, Number 5 (May 2017), p. 795-801    ( to contents , go back )

Low-temperature spectroscopy of optical centers in cerium-yttrium (Ce1–xYxO2–x/2) and cerium-zirconium (Ce1–xZrxO2) oxides

E.N. Okrushko, V.V. Seminko, P.O. Maksimchuk, I.I. Bespalova, N.V. Kononets, O.G. Viagin, and Yu.V. Malyukin

Institute for Scintillation Materials National Academy of Sciences of Ukraine, Nauky ave. 60, Kharkiv, 61072, Ukraine
E-mail: seminko@isma.kharkov.ua

Received November 10, 2016

Abstract

In the paper the results of investigation of isovalent (Zr4+) and nonisovalent (Y3+) impurity ions influence on the formation of oxygen vacancies in the lattice of ceria nanocrystals are shown. It was shown that the content of oxygen vacancies increases significantly at incorporation of both Y3+ and Zr4+ ions, while the oxygen vacancies are involved in the formation of optical centers of the two types: Ce3+–V˙˙–Ce3+ complexes and F+ centers. The ratio between the optical centers of various types can be controlled by varying a concentration of impurity ions and atmosphere of high-temperature treatment of nanocrystal.

PACS: 78.55.–m Photoluminescence, properties and materials.

Key words: ceria, luminescence, F-centers.

Published online: March 24, 2017

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