Effect of Si-N incorporation on color-tunable CaEuAl2-xSi xO4-xNx phosphors: Luminescence, thermal stability, and its application

Ying Chien Fang, Po Ching Kao, Sheng-Yuan Chu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Color tunable Ca0.96Eu0.04Al2-xSi xO4-xNx phosphors are prepared using a convenient solid-state reaction. Si-N content (x) was adjusted to study its effect on luminescence and thermal stability. This incorporation of Si-N effect drastically changes the bonds of phosphor materials from being ionic-rich to being covalent-rich. This transformation is investigated using x-ray diffraction, x-ray photoelectron spectra, and photoluminescence measurements. When the Si-N content was increased to 2, the phosphor properties significantly improved, with a broad excitation band, tunable-emission, and a high thermal quenching temperature (T50 175 C). Results show that Ca 0.96Eu0.04Si2O2N2 green phosphors with a broad excitation band and good thermal stability have potential for use in solid-state lighting and solar cells.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume158
Issue number4
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

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