Synthesis and Photoluminescence Study of Lanthanide (Dy3+ & Eu3+) Doped in Phosphate and Mixed Metal Oxides

Abstract

White light-emitting diodes as new solid-state light sources have a significantly capable application in the field of lighting and display. So far much effort has been devoted to exploring novel luminescent materials for White LEDs. Currently the major challenges in WLEDs are to achieve high luminous efficacy, high chromatic stability, brilliant color-rending properties, and price affordability against fluorescent lamps, which depend on critically on the phosphor properties. Numerous efforts have been made to develop single-phase white-light-emitting phosphors. In the present study, the Dy3+ doped phosphates have been synthesized and optical studies have been carried out. The Dy3+ doped compositions show wide range of color in the visible region (organish-yellow to white). In addition, efforts also been made to synthesis Eu3+ substituted mixed metal oxides (La0.95Eu0.05BW1-xMoxO6 (x = 0 – 1) and studied their photoluminescence properties. Selected compositions show good red emission under near UV to blue ray excitation. The presently studied compositions may find potential application as yellow and red phosphor for white LEDs.