Molten salt synthesis and luminescence of Dy 3+ -doped Y 3 Al 5 O 12 phosphors.

Dy ³⁺ -doped Y ₃ Al ₅ O ₁₂ phosphors were prepared at a relatively low temperature using molten salt synthesis. The phase of the prepared Dy ³⁺ -doped Y ₃ Al ₅ O ₁₂ phosphors was confirmed using X-ray powder diffraction. Results indicated that Dy ³⁺ doping did not change the Y ₃ Al ₅ O ₁₂ phase. Following excitation at 352 nm, emission spectra of the Dy ³⁺ -doped Y ₃ Al ₅ O ₁₂ phosphors consisted of blue, yellow, and red emission bands. The influence of Dy ³⁺ concentration and excitation wavelength on emission was investigated. The ratio of yellow light to blue light varied with change in Dy ³⁺ doping concentration, due to changes in the structure around Dy ³⁺ . Emission intensities also changed when the excitation wavelength was changed. This variation is luminescence generated a system for tunable white light for Dy ³⁺ -doped Y ₃ Al ₅ O ₁₂ phosphors.
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