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Cited by 302

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

Open access
Kumar, Amit, Babu, Suresh, Karakoti, Ajay Singh, Schulte, Alfons, Seal, Sudipta·2009·Langmuir

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 degrees C. The concentration of oxygen ion vacancy increased from 1.7x10(20) cm(-3) to 4.1x10(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.

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Metadata

Authors
Kumar, A., Babu, S., Karakoti, A. S., Schulte, A., & Seal, S.
Venue
Langmuir
Published
2009-08-14
Volume
25
Issue
18
Pages
10998-11007
ISSN
  • 0743-7463 (ISSN-L)
  • 1520-5827
OpenAlex
W2057712094
Cited by
302
References
1
FWCI
4.15
Type
journal article
Language
en
Open access
green

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