Microwave Sol–Gel Synthesis of CaGd2(MoO4)4:Er3+/Yb3+ Phosphors and Their Upconversion Photoluminescence Properties
URI (for links/citations):https://elib.sfu-kras.ru/handle/2311/28053
Лим, Ч. С.
Атучин, В. В.
Александровский, А. А.
Молокеев, М. С.
Орешонков, А. С.
Lim, C. S.
Atuchin, V. V.
Aleksandrovsky, A. S.
Molokeev, M. S.
Oreshonkov, A. S.
Journal Name:Journal of the American Ceramic Society
Journal Quartile in Scopus:Q1
Journal Quartile in Web of Science:Q1
Bibliographic Citation:Лим, Ч. С. Microwave Sol–Gel Synthesis of CaGd2(MoO4)4:Er3+/Yb3+ Phosphors and Their Upconversion Photoluminescence Properties [Текст] / Ч. С. Лим, В. В. Атучин, А. А. Александровский, М. С. Молокеев, А. С. Орешонков, C. S. Lim, V. V. Atuchin, A. S. Aleksandrovsky, M. S. Molokeev, A. S. Oreshonkov // Journal of the American Ceramic Society. — 2015. — Т. 98 (№ 10). — С. 3223-3230
CaGd2(MoO4)4:Er3+/Yb3+ phosphors with the doping concentrations of Er3+ and Yb3+ (x = Er3+ + Yb3+, Er3+ = 0.05, 0.1, 0.2, and Yb3+ = 0.2, 0.45) have been successfully synthesized by the microwave sol–gel method, and the crystal structure refinement and upconversion photoluminescence properties have been investigated. The synthesized particles, being formed after heat-treatment at 900°C for 16 h, showed a well-crystallized morphology. Under the excitation at 980 nm, CaGd2(- MoO4)4:Er3+/Yb3+ particles exhibited strong 525 and 550-nm emission bands in the green region and a weak 655-nm emission band in the red region. The Raman spectrum of undoped CaGd2(MoO4)4 revealed about 15 narrow lines. The strongest band observed at 903 cm– 1 was assigned to the m1 symmetric stretching vibration of MoO4 tetrahedrons. The spectra of the samples doped with Er and Yb obtained under 514.5 nm excitation were dominated by Er3+ luminescence preventing the recording Raman spectra of these samples. Concentration quenching of the erbium luminescence at 2H11/2?4I15/2 and 4S3/2?4I15/2 transitions in the CaGd2(MoO4)4:Er3+/Yb3+ crystal structure was established to be approximately at the 10 at.% doping level.