Luminescence properties of Ca 5(PO 4) 2SiO 4:Eu 2+ green phosphor for near UV-based white LED

Hee Suk Roh, Seyoon Hur, Hee Jo Song, Ik Jae Park, Dong Kyun Yim, Dong Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

A novel green phosphor of Eu 2+-doped Ca 5(PO 4) 2SiO 4 was prepared by a solid-state reaction. The Ca 5(PO 4) 2SiO 4:Eu 2+ phosphor was excited at wavelengths of 220-450 nm, which was suitable for the emission band of near ultraviolet (n-UV) light emitting diode (LED) (350-430 nm). In Ca 5(PO 4) 2SiO 4:Eu 2+ phosphor, there were three distinguishable Eu 2+ sites, which resulted in a strong green emission peaking at 530 nm and broad bands up to 700 nm. The effect of the activated Eu 2+ concentration on the photoluminescence (PL) emission intensity of the Ca 5(PO 4) 2SiO 4:Eu 2+ was also investigated. Here, a phosphor-converted LED (pc-LED) was fabricated through the integration of an InGaN-based n-UV LED and the Ca 5(PO 4) 2SiO 4:Eu 2+ phosphor. All of these characteristics indicated that this phosphor had a potential application in n-UV-based white LEDs.

Original languageEnglish
Pages (from-to)37-39
Number of pages3
JournalMaterials Letters
Volume70
DOIs
Publication statusPublished - 2012 Mar 1

Keywords

  • Ca (PO ) SiO
  • Eu -doped phosphor
  • Optimum concentration
  • Photoluminescence
  • White LED

ASJC Scopus subject areas

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

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