Tailoring of deep-red luminescence in Ca2SiO4:Eu 2+

Yasushi Sato, Hideki Kato, Makoto Kobayashi, Takaki Masaki, Dae Ho Yoon, Masato Kakihana

Research output: Contribution to journalArticle

140 Citations (Scopus)

Abstract

We report a new dicalcium silicate phosphor, Ca2-xEu xSiO4, which emits red light in response to blue-light excitation. When excited at 450 nm, deep-red emission at 650 nm was clearly observed in Ca1.2Eu0.8SiO4, the external and internal quantum efficiencies of which were 44 % and 50 %, respectively. The red emission from Ca2-xEuxSiO4 was strongly related to the peculiar coordination environments of Eu2+ in two types of Ca sites. The red-emitting Ca2SiO4:Eu 2+ phosphors are promising materials for next-generation, white-light-emitting diode applications. A dicalcium silicate phosphor, Ca 2-xEuxSiO4, emits red light in response to blue-light excitation. When excited at 450 nm, deep-red emission at 650 nm was clearly observed in Ca1.2Eu0.8SiO4. The picture shows a photograph of the corresponding Ca1.20Eu 0.80SiO4 phosphor upon excitation with blue LEDs. The external and internal quantum efficiencies were 44 % and 50 %, respectively.

Original languageEnglish
Pages (from-to)7756-7759
Number of pages4
JournalAngewandte Chemie - International Edition
Volume53
Issue number30
DOIs
Publication statusPublished - 2014 Jul 21

Keywords

  • crystal-site engineering
  • lanthanides
  • luminescence
  • phosphors
  • silicates

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Sato, Y., Kato, H., Kobayashi, M., Masaki, T., Yoon, D. H., & Kakihana, M. (2014). Tailoring of deep-red luminescence in Ca2SiO4:Eu 2+. Angewandte Chemie - International Edition, 53(30), 7756-7759. https://doi.org/10.1002/anie.201402520