Luminescent characteristics of green emitting Li 2Ca 2Si 2O 7:Eu 2+ phosphor

Ju Seong Kim, Hee Jo Song, Hee Suk Roh, Dong Kyun Yim, Jun Hong Noh, Kug Sun Hong

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We present a novel green emitting phosphor of Eu 2+-doped Li 2Ca 2Si 2O 7 which can be excited by ultra-violet light. The phosphors were synthesized at the low temperature of 900°C without any impurity phases by a solid-state reaction. The phosphor shows broad green emission centered at 520 nm under excitation at 350 nm. We found in the phosphor that the critical quenching concentration of Eu 2+ and the critical distance of energy transfer between Eu 2+ ions are 0.5 mol% and 56.2 Å, respectively. The thermal activation energy of the green luminescence was also measured to be 0.51 eV. The present work suggests that the Li 2Ca 2Si 2O 7:Eu 2+ phosphor is a kind of potential green-emitting phosphor.

Original languageEnglish
Pages (from-to)112-115
Number of pages4
JournalMaterials Letters
Volume79
DOIs
Publication statusPublished - 2012 Jul 15
Externally publishedYes

Keywords

  • Li Ca Si O
  • Photoluminescence
  • Silicate phosphor
  • White UV-LED

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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