Luminescence of Eu:Y{sub 3}Al{sub 5}O{sub 12}, Eu:Lu{sub 3}Al{sub 5}O{sub 12}, and Eu:GdAlO{sub 3} Nanocrystals Synthesized by Solution Combustion
Journal Article
·
· Journal of Applied Spectroscopy
- Belarusian State Technological University (Belarus)
- ITMO University (Russian Federation)
- Belarusian State University (Belarus)
- SOL Instruments (Belarus)
- Belarusian National Technical University, Center for Optical Materials and Technologies (Belarus)
Nanocrystals of rare-earth garnets Y{sub 3}Al{sub 5}O{sub 12} and Lu{sub 3}Al{sub 5}O{sub 12} and perovskite GdAlO{sub 3} highly doped (10–20 at%) with Eu{sup 3+} are synthesized by the solution combustion technique and subsequent annealing in air at 800 and 1300{sup o}C. Their structure, morphology, and phase composition are studied. These materials exhibit intense red luminescence under UV excitation. Eu:GdAlO{sub 3} luminescence has CIE 1931 color coordinates (0.632, 0.368); dominant wavelength, 599.6 nm; and color purity, >99%. Judd–Ofelt parameters, luminescence branching ratios, and lifetimes of the Eu{sup 3+5}D{sub 0} state are determined. The luminescence quantum yield for Eu:GdAlO{sub 3} (10 at%) reaches 74% with a lifetime of 1.4 ms for the {sup 5}D{sub 0} state. The synthesized materials are promising for red ceramic phosphors.
- OSTI ID:
- 22810294
- Journal Information:
- Journal of Applied Spectroscopy, Journal Name: Journal of Applied Spectroscopy Journal Issue: 5 Vol. 84; ISSN 0021-9037
- Country of Publication:
- United States
- Language:
- English
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