Luminescence of Eu:Y3Al5O12, Eu:Lu3Al5O12, and Eu:GdAlO3 Nanocrystals Synthesized by Solution Combustion

• Published in: Journal of applied spectroscopy Vol. 84; no. 5; pp. 866 - 874
• Main Authors: Vilejshikova, E. V., Khort, A. A., Podbolotov, K. B., Loiko, P. A., Shimanski, V. I., Shashkov, S. N., Yumashev, K. V.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-11-2017; Springer Nature B.V
• Subjects: Analytical Chemistry; Atomic/Molecular Structure and Spectra; Color; Combustion; Europium; europium ion; garnet; Garnets; Luminescence; nanocrystal; Nanocrystals; perovskite; Phase composition; Phosphors; Physics; Physics and Astronomy; Rare earth elements; solution combustion synthesis; Synthesis; nanocrystal; garnet; perovskite; europium ion; luminescence; solution combustion synthesis
• ISSN: 0021-9037; 1573-8647; 1573-8647
• DOI: 10.1007/s10812-017-0557-5

Nanocrystals of rare-earth garnets Y
3
Al
5
O
12
and Lu
3
Al
5
O
12
and perovskite GdAlO
3
highly doped (10–20 at%) with Eu
3+
are synthesized by the solution combustion technique and subsequent annealing in air at 800 and 1300
o
C. Their structure, morphology, and phase composition are studied. These materials exhibit intense red luminescence under UV excitation. Eu:GdAlO
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
3+ 5
D
0
state are determined. The luminescence quantum yield for Eu:GdAlO
3
(10 at%) reaches 74% with a lifetime of 1.4 ms for the
5
D
0
state. The synthesized materials are promising for red ceramic phosphors.