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Vol. 27 No. 9 (2015): Vol 27 Issue 9

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Synthesis of NaLa(MoO4)2:Eu3+/Yb3+ Phosphors via Microwave-Modified Sol-Gel Route and Their Upconversion Photoluminescence Properties

https://doi.org/10.14233/ajchem.2015.18569
Chang Sung Lim
Department of Advanced Materials Science and Engineering, Hanseo University, Seosan 356-706, Republic of Korea

Corresponding Author(s) : Chang Sung Lim

cslim@hanseo.ac.kr

Asian Journal of Chemistry, Vol. 27 No. 9 (2015): Vol 27 Issue 9

Abstract

NaLa1-x(MoO4)2:Eu3+/Yb3+ phosphors with doping concentrations of Eu3+ and Yb3+ (x = Eu3+ + Yb3+, Eu3+ = 0.05, 0.1, 0.2 and Yb3+ = 0.2, 0.45) were successfully synthesized via the microwave-modified sol-gel route and the upconversion and spectroscopic properties were investigated. Well-crystallized particles showed a fine and homogeneous morphology with particle sizes of 5-10 μm. Under excitation at 980 nm, NaLa0.5(MoO4)2:Er0.05Yb0.45 particles exhibited a strong 525 nm emission band and a weak 550 nm emission band in the blue region and a very weak 655 nm emission band in the red region. The Raman spectra of NaLa0.8(MoO4)2:Eu0.2, NaLa0.7(MoO4)2:Eu0.1Yb0.2 and NaLa0.5(MoO4)2:Eu0.05Yb0.45 particles indicated the domination of strong peaks at higher frequencies (762, 890, 1358 and 1430 cm-1) and weak peaks at lower frequencies (323, 388 and 450 cm-1).

Keywords

Phosphors Microwave sol-gel Upconversion Raman spectroscopy
Sung Lim, C. (2015). Synthesis of NaLa(MoO4)2:Eu3+/Yb3+ Phosphors via Microwave-Modified Sol-Gel Route and Their Upconversion Photoluminescence Properties. Asian Journal of Chemistry, 27(9), 3289–3292. https://doi.org/10.14233/ajchem.2015.18569
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