Research output: Contribution to journal › Article › peer-review
Microwave synthesis and spectroscopic properties of ternary scheelite-type molybdate phosphors NaSrLa(MoO4)3 : Er3+,Yb3+. / Lim, Chang Sung; Aleksandrovsky, Aleksandr S.; Molokeev, Maxim S. et al.
In: Journal of Alloys and Compounds, Vol. 713, 05.08.2017, p. 156-163.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Microwave synthesis and spectroscopic properties of ternary scheelite-type molybdate phosphors NaSrLa(MoO4)3
T2 - Er3+,Yb3+
AU - Lim, Chang Sung
AU - Aleksandrovsky, Aleksandr S.
AU - Molokeev, Maxim S.
AU - Oreshonkov, Aleksandr S.
AU - Atuchin, Victor V.
PY - 2017/8/5
Y1 - 2017/8/5
N2 - Ternary scheelite-type molybdate NaSrLa(1-x-y)(MoO4)3:xEr3+,yYb3+ (x = y = 0, x = 0.1 and y = 0.2, x = 0.05 and y = 0.45, x = 0.2 and y = 0) phosphors were successfully synthesized by the microwave sol-gel method for the first time. Well-crystallized particles formed after the heat-treatment at 900 °C for 16 h showed a fine and homogeneous morphology with a particle size of 2–3 μm. The crystal structures were refined by the Rietveld method in space group I41/a. The optical properties were examined comparatively using photoluminescence emission and Raman spectroscopy. Under the excitation at 980 nm, the NaSrLa0.7(MoO4)3:0.1Er3+,0.2Yb3+ and NaSrLa0.5(MoO4)3:0.05Er3+,0.45Yb3+ particles exhibited a strong 525-nm emission band, a weaker 550-nm emission band in the green region and weak 655-nm, 490-nm and 410-nm emission bands in the red, blue and violet regions. The pump power dependence and Commission Internationale de L'Eclairage chromaticity of the upconversion emission intensity were evaluated in detail. The presence of Sr in NaSrLa(MoO4)3, in comparison with NaCaLa(MoO4)3 compound, leads to frequency shift mainly in the low region of Raman spectra. The MoO4 bending vibrations are most susceptible to changes in the distance between the nearest oxygen atoms in the nearest neighboring MoO4 groups.
AB - Ternary scheelite-type molybdate NaSrLa(1-x-y)(MoO4)3:xEr3+,yYb3+ (x = y = 0, x = 0.1 and y = 0.2, x = 0.05 and y = 0.45, x = 0.2 and y = 0) phosphors were successfully synthesized by the microwave sol-gel method for the first time. Well-crystallized particles formed after the heat-treatment at 900 °C for 16 h showed a fine and homogeneous morphology with a particle size of 2–3 μm. The crystal structures were refined by the Rietveld method in space group I41/a. The optical properties were examined comparatively using photoluminescence emission and Raman spectroscopy. Under the excitation at 980 nm, the NaSrLa0.7(MoO4)3:0.1Er3+,0.2Yb3+ and NaSrLa0.5(MoO4)3:0.05Er3+,0.45Yb3+ particles exhibited a strong 525-nm emission band, a weaker 550-nm emission band in the green region and weak 655-nm, 490-nm and 410-nm emission bands in the red, blue and violet regions. The pump power dependence and Commission Internationale de L'Eclairage chromaticity of the upconversion emission intensity were evaluated in detail. The presence of Sr in NaSrLa(MoO4)3, in comparison with NaCaLa(MoO4)3 compound, leads to frequency shift mainly in the low region of Raman spectra. The MoO4 bending vibrations are most susceptible to changes in the distance between the nearest oxygen atoms in the nearest neighboring MoO4 groups.
KW - Crystal structure
KW - Frequency up conversion
KW - Microwave synthesis
KW - Molybdate phosphor
KW - RAMAN-SPECTRA
KW - CRYSTAL-STRUCTURE
KW - OPTICAL-PROPERTIES
KW - X-RAY-DIFFRACTION
KW - LUMINESCENCE PROPERTIES
KW - UP-CONVERSION PHOTOLUMINESCENCE
KW - REFINEMENT
KW - SINGLE-CRYSTALS
KW - VIBRATIONAL PROPERTIES
KW - INDUCED PHASE-TRANSITIONS
UR - http://www.scopus.com/inward/record.url?scp=85018507884&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2017.04.060
DO - 10.1016/j.jallcom.2017.04.060
M3 - Article
AN - SCOPUS:85018507884
VL - 713
SP - 156
EP - 163
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -
ID: 9980706