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Vol. 27 No. 7 (2015): Vol 27 Issue 7, 2015

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Cyclic Microwave-Assisted Sol-Gel Process of KGd(MoO4)2:Er3+/Yb3+ Phosphors and Upconversion of their Photoluminescence Properties

https://doi.org/10.14233/ajchem.2015.18428
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. 7 (2015): Vol 27 Issue 7, 2015

Abstract

KGd1-x(MoO4)2:Er3+/Yb3+ phosphors with doping concentrations of Er3+ and Yb3+ (x = Er3+ + Yb3+, Er3+ = 0.05, 0.1, 0.2 and Yb3+ = 0.2, 0.45) Er3+ and Yb3+ (Er3+ = 0.05, 0.1, 0.2 and Yb3+ = 0.2, 0.45) were successfully synthesized by a cyclic microwave-assisted sol-gel process and the upconversion and spectroscopic properties were investigated. Well-crystallized particles showed a fine and homogeneous morphology with particle sizes of 2-8 μm. Under excitation at 980 nm, KGd0.7(MoO4)2:Er0.1Yb0.2 and KGd0.5(MoO4)2:Er0.05Yb0.45 particles exhibited a strong 525 nm emission band, a weak 550 nm emission band in the green region and a very weak 655 nm emission band in the red region. The Raman spectra of KGd0.8(MoO4)2:Er0.2, KGd0.7(MoO4)2:Er0.1Yb0.2 and KGd0.5(MoO4)2:Er0.05Yb0.45 particles indicated the domination of strong peaks at higher frequencies (1050, 1065, 1125, 1185, 1284, 1350 and 1420 cm-1) and at lower frequencies (258, 388, 462, 558, 630 and 674 cm-1).

Keywords

Upconversion photoluminescence Microwave-assisted sol-gel process Raman spectroscopy
Sung Lim, C. (2015). Cyclic Microwave-Assisted Sol-Gel Process of KGd(MoO4)2:Er3+/Yb3+ Phosphors and Upconversion of their Photoluminescence Properties. Asian Journal of Chemistry, 27(7), 2598–2602. https://doi.org/10.14233/ajchem.2015.18428
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