Combustion‐assisted Ca_8.25Na_1.5Al₆O₁₈:Sm³⁺ phosphors for solid‐state lighting and WLED applications

Abstract

Aluminate‐based phosphors have been the most investigated luminescent phosphors over decades due to their outstanding optical properties. In the proposed work, a series of Sm3+‐doped Ca8.25Na1.5Al6O18 (CNAO) phosphor sample was prepared using a simple combustion technique with the help of two fuels i.e., urea–glycine. The purity of phase and structural analysis of the CNAO phosphors were confirmed using X‐ray diffraction analysis. Vibrational features of this phosphors confirmed were via Fourier transform infrared analysis. A photoluminescence study of this phosphor showed a doublet emission at 568 and 576 nm in the yellow region attributable to the 4G5/2→6H5/2 transition of Sm3+ ions, whereas a doublet peak noticed in red region ranged from 600 to 620 nm and was attributable to the 4G5/2→6H7/2 transition of Sm3+ ions. Moreover, Commission Internationale de l'éclairage colour coordinates were also located in the yellowish‐red region and confirmed the potential of this phosphor as a yellowish‐red component for white light‐emitting diodes and display devices applications.