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Optical Properties of Blue-Emitting BaAl2S4:Eu Thin-Films for Inorganic EL Display

Authors
Journal
Journal of Rare Earths
1002-0721
Publisher
Elsevier
Publication Date
Volume
24
Issue
1
Identifiers
DOI: 10.1016/s1002-0721(07)60338-x
Keywords
  • Photoluminescence
  • Band-Gap Energy
  • Baal2S4:Eu
  • Electroluminescence
  • Dielectric Constant
  • Rare Earths

Abstract

Abstract The optical properties of blue emitting BaAl 2S 4:Eu thin-films were studied. The emission peak is around 470 nm, whose FWHM (full width at half maximum) is 35 nm. The dielectric constant is 3.03 from transmission spectrum, and the optical band gap is approximately 4.6 eV. It is found that the cubic phase and orthorhombic phase exist in fabricated thin-films. Furthermore, the energy band structure of BaAl 2S 4:Eu thin-films from X-ray photo-electron spectra (XPS) and the absorption spectra were analyzed.

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