Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766163 | Dyes and Pigments | 2017 | 37 Pages |
Abstract
Ca2âxAl2SiO7:xEu3+ (0.03 â¤Â x â¤Â 0.21) and Sr2âxAl2SiO7:xEu3+ (0.03 â¤Â x â¤Â 0.15) phosphors are effectively excited by near-UV light (396 nm). The host composition and Eu3+ concentration of the two series phosphors substantially affect its emission characteristics. The calcium aluminosilicate Ca1.82Al2SiO7:0.18Eu3+ is 377% higher in red emission intensity than the Ca1.97Al2SiO7:0.03Eu3+, whereas the strontium aluminosilicate Sr1.88Al2SiO7:0.12Eu3+ is 343% higher in red emission intensity than the Sr1.97Al2SiO7:0.03Eu3+. In addition, the Eu3+ concentration of the Sr2âxAl2SiO7:xEu3+ (x = 0.12) showing the highest red emission intensity is much lower than that of the Ca2âxAl2SiO7:xEu3+ (x = 0.18). In spite of the low Eu3+ concentration, the red emission intensity and red color purity of Sr1.88Al2SiO7:0.12Eu3+ are much stronger and higher than those of the Ca1.82Al2SiO7:0.18Eu3+. Of the prepared phosphors, Sr1.88Al2SiO7:0.12Eu3+ is the optimal composition for obtaining strong and pure red light. Strontium aluminosilicate Sr2âxAl2SiO7:xEu3+ has distinct advantages including strong emission intensity, high color purity, and cost effectiveness.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
K. Park, H. Kim, D.A. Hakeem,