Synthesis and luminescent properties of a new red-emitting phosphor for solid-state lighting: Eu0.1GdxLa1.9−xTeO6 (0.02⩽x⩽0.1)

The photoluminescence (PL) emission and excitation behavior of red-emitting Eu0.1GdxLa1.9−xTeO6 (0.02⩽x⩽0.1) powder phosphors is reported. Three dominant bands centered at 395, 466 and 534 nm characterized the excitation spectrum. Under the excitation of 395 nm UV light, the emission spectrum exhibits an intense peak centered at 616 nm corresponding to the 5D0→7F2 transition of Eu3+. Because the f→f transitions are located in the wavelength range of blue or near-UV range, optimized phosphor, Eu0.10Gd0.08La1.82TeO6, is a promising material for solid-state lighting based on GaN LEDs applications.