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2016 Vol.26, Issue 7 Preview Page
Synthesis of NaCaLa(MoO4)3:Ho3+/Yb3+ Phosphors via Microwave Sol-Gel Route and Their Upconversion Photoluminescence Properties
Chang Sung Lim†
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan 31962, Republic of Korea
†Corresponding author cslim@hanseo.ac.kr (C. S. Lim, Hanso Univ.)
July 2016. pp. 363-369
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Abstract

NaCaLa1-x(MoO4)3:Ho3+/Yb3+ ternary molybdates with proper doping concentrations of Ho3+ and Yb3+ (x = Ho3+ +Yb3+, Ho3+ = 0.05 and Yb3+ = 0.35, 0.40, 0.45 and 0.50) were successfully synthesized by microwave sol-gel method. Well-crystallized particles formed after heat-treatment at 900 °C for 16 h showed a fine and homogeneous morphology with particle sizes of 3-5 μm. Under excitation at 980 nm, the UC intensities of the doped samples exhibited strong yellow emissions based on the combination of strong emission bands at 520-nm and 630-nm emission bands in the green and red spectral regions, respectively. The optimal Yb3+:Ho3+ ratios were obtained at 9:1 and 10:1, as indicated by the compositiondependent quenching effect of the Ho3+ ions. The pump power dependence of the upconversion emission intensity and the Commission Internationale de L’Eclairage chromaticity coordinates of the phosphors were evaluated in detail.

Keywords
microwave sol-gel
ternary molybdate
yellow phosphors
upconversion
Raman spectroscopy
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 26
  • No :7
  • Pages :363-369
  • Received Date : 2016-03-06
  • Revised Date : 2016-06-10
  • Accepted Date : 2016-06-13
  • DOI :https://doi.org/10.3740/MRSK.2016.26.7.363
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