Title

Luminescence Properties of Europium-Doped Cerium Oxide Nanoparticles: Role of Vacancy and Oxidation States

Authors

Authors

A. Kumar; S. Babu; A. S. Karakoti; A. Schulte;S. Seal

Abbreviated Journal Title

Langmuir

Keywords

RARE-EARTH IONS; SINGLE-CRYSTAL; PHOSPHOR; SPECTRA; PHOTOLUMINESCENCE; NANOCRYSTALS; INTENSITIES; CATALYSTS; NANOCERIA; OXYGEN; Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, ; Multidisciplinary

Abstract

Enhancing the optical emission of cerium oxide nanoparticles is essential for potential biomedical I 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 all 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 degrees C. The concentration of oxygen ion vacancy increased from 1.7 x 10(20) cm(-3) to 4.1 x 10(20) 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.

Journal Title

Langmuir

Volume

25

Issue/Number

18

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

10998

Last Page

11007

WOS Identifier

WOS:000269655000079

ISSN

0743-7463

Share

COinS