Journal
THIN SOLID FILMS
Volume 573, Issue -, Pages 100-106Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2014.10.105
Keywords
Photoluminescent properties; Thin films; Chemical solution deposition
Categories
Funding
- Natural Science Foundation of China [51172289]
- National Basic Research Program (973 Program) of China [2012CB619302]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110171130004]
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(200)-oriented Eu-doped cerium oxide thin films were fabricated, on fused silica substrates by a chemical solution deposition method. The thin films obtained were characterized by X-ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, and photoluminescence measurements. Ce with valence state 4+ is confirmed to be predominant in Eu-doped CeO2 thin films. All the thin films were dense and crack-free, and showed bright orange-red emissions under ultraviolet light excitation, originated from the D-5(0) -> F-7(1) and D-5(0) -> F-7(2) transitions of Eu3+ ions. Structure distortions induced by Eu-doping affected the light emission of electric dipole transition D-5(0) -> F-7(2). The strongest photoluminescent intensity was observed in the thin films with a Eu-doping content x of 0.08, indicating the existence of concentration quenching effect of photoluminescence. Lifetime study of photoluminescence indicated that the decrease of lifetime was originated from augmented pathway for deactivating excited Eu3+ ions. Our study suggests that Eu3+-doped CeO2 thin films have potential applications in optoelectronic devices. (C) 2014 Elsevier B.V. All rights reserved.
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