Title

Luminescence Properties Of Europium-Doped Cerium Oxide Nanoparticles: Role Of Vacancy And Oxidation States

Abstract

Enhancing the optical emission of cerium oxide nanoparticles is essential for potential biomedical applications. In the present work, we report a simple chemical precipitation technique to synthesize europium-doped cerium oxide nanostructures to enhance the emission properties. Structural and optical properties showed an acute dependence on the concentration of oxygen ion vacancy and trivalent cerium, which, in turn, could be modified by dopant concentration and the annealing temperature. Results from X-ray photoelectron spectroscopy showed an increase in tetravalent cerium concentration to 85% on annealing at 900 °C. The concentration of oxygen ion vacancy increased from 1.7x10 20 cm-3 to4.1x1020 cm-3 with the increase in dopant concentration. Maximum emission at room temperature was obtained for 15 mol % Eu-doped ceria, which improved with annealing temperature. The role of oxygen ion vacancies and trivalent cerium in modifying the emission properties is discussed. © 2009 American Chemical Society.

Publication Date

9-15-2009

Publication Title

Langmuir

Volume

25

Issue

18

Number of Pages

10998-11007

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/la901298q

Socpus ID

70349932956 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/70349932956

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