Molten salt synthesis and luminescence of Dy3+ -doped Y3 Al5 O12 phosphors

Abstract

Dy³⁺ -doped Y₃ Al₅ O₁₂ phosphors were prepared at a relatively low temperature using molten salt synthesis. The phase of the prepared Dy³⁺ -doped Y₃ Al₅ O₁₂ phosphors was confirmed using X-ray powder diffraction. Results indicated that Dy³⁺ doping did not change the Y₃ Al₅ O₁₂ phase. Following excitation at 352 nm, emission spectra of the Dy³⁺ -doped Y₃ Al₅ O₁₂ phosphors consisted of blue, yellow, and red emission bands. The influence of Dy³⁺ concentration and excitation wavelength on emission was investigated. The ratio of yellow light to blue light varied with change in Dy³⁺ doping concentration, due to changes in the structure around Dy³⁺ . Emission intensities also changed when the excitation wavelength was changed. This variation is luminescence generated a system for tunable white light for Dy³⁺ -doped Y₃ Al₅ O₁₂ phosphors.

Keywords: Y3Al5O12:Dy3+; molten salt synthesis; white light.