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 journalArticlepeer-review

    154 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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