Influence of reaction aging time on the crystal structure, morphology, and photoluminescence properties of Sm³⁺-doped CdMoO₄ phosphor

Lighting is one of the very important applications of phosphor. The lighting sector consumed about 15–22% of the total electricity production in the world. In the present paper, reddish orange color–emitting Sm³⁺ ion-doped CdMoO₄ phosphors have been prepared by the hydrothermal method at a temperature of 120 °C for the lighting application. It investigates the effect of reaction aging time on morphology, size, and luminescence properties. The crystallinity, grain size, and luminescence efficiency were strongly influenced by the aging time. The phosphors showed sharp bands due to strong energy transfers from the host CdMoO₄ to the dopant Sm³⁺ ion. With the increase of aging time, the emission intensity is increasing due to the increase of crystallinity, and also being more intense of the emitted color. It is believed that the prepared phosphors will have potential applications in lighting devices.