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- Title
Photoluminescence characteristics and energy transfer between Bi<sup>3+</sup> and Eu<sup>3+</sup> in Gd<sub>2</sub>O<sub>3</sub>: Eu<sup>3+</sup>, Bi<sup>3+</sup> nanophosphors.
- Authors
Wei, X. T.; Chen, Y. H.; Cheng, X. R.; Yin, M.; Xu, W.
- Abstract
Bi3+ and Eu3+ codoped cubic Gd2O3 nanocrystals were prepared by the Pechini sol-gel method. Their photoluminescent properties were investigated under ultraviolet light excitation. The introduction of Bi3+ ions broadened the excitation band of Eu3+ emission, of which a new strong band occurred ranging from 320 to 380 nm due to the 6s2→6s6p transition of Bi3+ ions, implying a very efficient energy transfer from Bi3+ ions to Eu3+ ions. Upon 325 and 355 nm light excitation, the luminescent intensity of Eu3+ ions was remarkably improved by the incorporation of Bi3+ ions. But a significant quenching of Eu3+ emission was observed under 266 nm light excitation when Bi3+ was codoped. The possible energy transfer processes between Bi3+ and Eu3+ were discussed. The decay curves of Eu3+ emission under the excitation of 266 nm pulsed laser were measured and gave further evidence for our discussion.
- Subjects
PHOTOLUMINESCENCE; PROPERTIES of matter; NANOCRYSTALS; ULTRAVIOLET radiation; ENERGY transfer; ENERGY storage
- Publication
Applied Physics B: Lasers & Optics, 2010, Vol 99, Issue 4, p763
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-010-3971-4