Synthesis and luminescence investigation of Eu3+ and Dy3+ doped NaAl(PO3)4 glass for solid state lighting applications

Abstract

Phosphite based glass phosphors have been a potential candidate in the field of luminescent spectroscopy. In this respect, the proposed work of Eu³⁺ and Dy³⁺ doped NaAl(PO₃)₄ glass samples prepared by melt quenching synthesis technique. The emission spectrum of Eu³⁺ doped NaAl(PO₃)₄ glass demonstrate sharp and intense peaks at 594 nm and 614 nm region ascribed to typical ⁵D₀→⁷F₁ and ⁵D₀→⁷F₂ transitions of Eu³⁺ ions. In the case of Dy³⁺ doped NaAl(PO₃)₄ glasses, emission spectra display an emission band at 482 nm (blue colour) and 576 nm (yellow colour) due to the ⁴F_9/2 to ⁶H_15/2 and ⁴F_9/2 to ⁶H_13/2 transitions of Dy³⁺ ions. Furthermore, Commission Internationale de l'Éclairage (CIE) chromaticity coordinates and colour purity of the prepared samples were calculated using a CIE colour calculator. The CIE chromaticity diagram depicts coordinate in the near red and near white color region for Eu³⁺ and Dy³⁺ doped samples, respectively. According to obtained results, it was found that prepared glass samples have a huge potential for future investigation in the field of solid-state lighting and display devices.