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Journal of Sol-Gel Science and Technology

, Volume 77, Issue 1, pp 136–144 | Cite as

Luminescent Eu3+-doped NaLa(WO4)(MoO4) and Ba2CaMoO6 prepared by the modified Pechini method

  • M. Sletnes
  • S. L. Skjærvø
  • M. Lindgren
  • T. Grande
  • M.-A. EinarsrudEmail author
Original Paper

Abstract

Modified Pechini synthesis routes were developed for synthesis of the novel red phosphor materials NaLa(WO4)(MoO4):Eu3+ and Ba2CaMoO6:Eu3+. Phase pure NaLa(WO4)(MoO4):Eu3+ was obtained at calcination temperatures ≥600 °C using malic acid or tartaric acid as complexing agents. Phase pure Ba2CaMoO6:Eu3+ was attained using EDTA and citric acid, at calcination temperatures ≥800 °C. Choice of complexing agents were discussed on the basis of the solubility of the precursors, metal complex stability constants and conformations of the complexes. The powder properties were characterised using X-ray diffraction, thermal analysis and electron microscopy. Photoluminescence emission intensity was studied as a function of the complexing agents used and calcination temperature of the powders. Maximum emission intensity for NaLa(WO4)(MoO4):Eu3+ was obtained at a calcination temperature of 600 °C, whereas the maximum for Ba2CaMoO6:Eu3+ was obtained after calcination at 1100 °C. Both materials displayed desirable optical properties for use as phosphors in white light-emitting diodes.

Graphical Abstract

Phase pure NaLa(WO4)(MoO4):Eu3+ and Ba2CaMoO6:Eu3+ red phosphor materials were synthesised by the modified Pechini route, thus permitting lower calcination temperatures which resulted in increased emission intensity for NaLa(WO4)(MoO4):Eu3+.

Keywords

Pechini Phosphor WLED Ba2CaMoO6 NaLa(WO4)(MoO4Photoluminescence 

Notes

Acknowledgments

The work was funded by the Norwegian University of Science and Technology within the strategic research area Materials.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • M. Sletnes
    • 1
  • S. L. Skjærvø
    • 1
  • M. Lindgren
    • 2
  • T. Grande
    • 1
  • M.-A. Einarsrud
    • 1
  1. 1.Department of Materials Science and EngineeringNorwegian University of Science and TechnologyTrondheimNorway
  2. 2.Department of PhysicsNorwegian University of Science and TechnologyTrondheimNorway

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