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Synthesis, structure and photoluminescence properties of fine yellow-orange Ca-α-SiAlON: Eu2+ phosphors
- Source :
-
Journal of Alloys & Compounds . Nov2012, Vol. 541, p70-74. 5p. - Publication Year :
- 2012
-
Abstract
- Abstract: Yellow-orange oxynitride Ca-α-SiAlON: Eu2+ phosphors with the compositions of Ca0.8Si9.2Al2.8O1.2N14.8: xEu2+ (x =0–0.24) were obtained via carbothermal reduction and nitridation method. Crystallographic parameters of the refinement structure with triclinic space group P31c (159) were obtained by XRD refinement as a = b =7.8859(3)Å, c =5.7336(2)Å, V =308.7915(3)Å3, Z =1. The resulting phosphors can absorb light in the range of 300–500nm efficiently and show a single intense broad emission band in the wavelength range of 500–700nm with maximum intensity at 580–601nm. The chromaticity coordinates of the synthesized Ca-α-SiAlON: Eu2+ phosphors can be tailored by simply controlling the activator concentration. All the results show that Ca-α-SiAlON: Eu2+ phosphors can be a candidate for warm white LEDs. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 541
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 80028706
- Full Text :
- https://doi.org/10.1016/j.jallcom.2012.06.107