Luminescence enhancement of LiSrPO4:Eu2+ phosphor by Mg2+ ion addition

Shinnosuke Kamei, Tomoki Hatsumori, Takuya Hasegawa, Tadashi Ishigaki, Kazuyoshi Uematsu, Kenji Toda, Mineo Sato

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Mg-doped LiSrPO4:Eu2+ (Li(Sr, Mg)PO4:Eu2+) phosphors, in which some Sr2+ ions were replaced by Mg2+ ions, were prepared using a conventional solid-state reaction method. The crystal structure of the phosphors was hexagonal, which is the high-temperature phase of LiSrPO4, even though synthesis was carried out at a relatively low temperature of 900 °C. Fluorescence could be efficiently excited in the 220–400 nm ultraviolet region, and bright blue emission was produced with a peak at 448 nm. The emission intensity was higher than that for LiSrPO4:Eu2+ without Mg doping, and a lower Eu content (1 mol%) was required in order to reach the maximum intensity. These results indicate that the blue-emitting Li(Sr, Mg)PO4:Eu2+ phosphor is a promising candidate for phosphor-conversion white Light Emitting Diodes.

Original languageEnglish
Pages (from-to)359-362
Number of pages4
JournalMaterials Research Innovations
Issue number6
Publication statusPublished - 2019 Sept 19


  • chemical synthesis
  • inorganic compounds
  • Optical materials
  • phosphors


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