Morphology control of LaP04:Tb,Ce phosphor by precipitation from homogeneous solution

Masato Taneishi, Koji Tomita, Kazumi Fujita, Masato Kakihana

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LaP04:Ce,Tb particles were prepared by precipitation from homogeneous solution using urea and hexamethylenetetramine (HMT). Effects of increasing molar concentration of cation and anion, adding hydroxylic carboxylic acid on the morphology and photoluminescence properties of LaP0 4:Ce,Tb phosphor were investigated. Prepared LaP04 was hydrate. The particles were needle-like shaped when using urea as a precipitant and rod shaped when using HMT. Both particle lengths were about 2/im. Increasing molar concentration of H3P04, the formed particles were smaller than that synthesized by the stoichiometric ratio and strongly agglomerated. Adding hydroxylic carboxylic acid as additives, the morphology of particles turned into various form such as spherical, cubic, rectangular and cross shape. However the morphology of LaP04:Ce,Tb phosphor was not homogeneous because of the morphology of TbP04and CeP04 which were bonding rod and cone. The prepared LaP04:Ce,Tb phosphor showed strong green emission by UV excitation. The luminescence intensity was stronger when using urea rather than HMT.

Original languageEnglish
Pages (from-to)635-639
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number10
Publication statusPublished - 2009 Oct


  • Morphology control
  • Phosphor
  • Photoluminescence property
  • Precipitation from homogeneous solution

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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