Characteristics of MgO-coated alkaline earth selenide phosphor prepared by spray pyrolysis

Wonkeun Chung, Hyunchul Jung, Chang Hun Lee, Sung Hyun Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Spherical submicron sized Eu2+-activated SrSe and CaSe alkaline earth selenide phosphorswere prepared by ultrasonic spray pyrolysis. The particle size decreased with decreasing precursor solution concentration, while the pyrolysis temperature had a negligible effect on the particles size and morphology. Due to the d-f transition of Eu2+, SrSe:Eu2+ and CaSe:Eu2+ showed the broad band emission with maximum peaks at 565 and 608 nm, respectively. Further, the addition of 10 wt% NH4Cl flux helped to enhance the emission intensity by reducing the surface defects. MgO coating on selenide phosphor surface effectively improved the moisture stability without a significant loss in the luminescence intensity. 5-10 wt% MgO-coated SrSe: Eu2+, and CaSe:Eu2+ nearly retained their initial luminescence intensity under water condition.

Original languageEnglish
Pages (from-to)98-103
Number of pages6
JournalThin Solid Films
Volume546
DOIs
Publication statusPublished - 2013 Nov 1

Keywords

  • Alkaline earth selenide
  • MgO coating
  • Phosphor
  • Spray pyrolysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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