Spectroscopically Detected Formation of Oxygen Vacancies in Nano-Crystalline CeO2 – x

Authors P.O. Maksimchuk, A.A. Masalov, Yu.V. Malyukin

Institute for Scintillation Materials National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkov Ukraine

Е-mail  pmaksimchuk@isma.kharkov.ua
Issue Volume 5, Year 2013, Number 1
Dates Received 15 November 2012; revised manuscript received 05 March 2013; published online 28 March 2013
Citation P.O. Maksimchuk, A.A. Masalov, Yu.V. Malyukin, J. Nano- Electron. Phys. 5 No 1, 01004 (2013)
PACS Number(s) 78.67.Bf
Keywords Cerium oxide nanoparticles, Oxygen vacancies, High temperature treatment.
Annotation In this work the peculiarities of oxygen vacancies formation in cerium oxide nanoparticles for different external influences have been investigated by spectroscopic methods. The features of oxygen vacancies and therefore non-stoichiometric cerium oxide formation in CeO2 nanocrystals depending on the atmosphere of high temperature treatment were investigated. Stimulation of oxygen vacancies formation in reducing and neutral atmospheres was revealed. Occurrence of two different luminescence centers (viz. the charge-transfer complexes formed by Ce4 + and O2 – ions, and Ce3 + ions stabilized by vacancies) after cerium oxide nanoparticles annealing in a neutral atmosphere has been observed.

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