Synthesis and photoluminescence properties of Eu3+, Sm3+ and Pr3+ doped Ca2ZnWO6 phosphors for phosphor converted LED

In this work, we report on the synthesis and photoluminescence (PL) properties of rare earth (Eu3+, Sm3+ and Pr3+) doped double perovskite tungstate Ca2ZnWO6 phosphor. The phosphors were synthesized by two step modified solid state method. Phase purity and formation of phosphor were confirmed by XRD technique. PL spectra of Eu3+, Sm3+, and Pr3+ doped phosphor show intense emission peaks in red region at 615, 604 and 650 nm respectively, upon the visible excitation of 466 nm (Eu3+), 410 nm (Sm3+) and 491 nm (Pr3+). The CIE coordinates of the phosphors are in the yellow (Sm3+ doped sample) and orange (Eu3+ and Pr3+ doped sample) regions near the edge of color space which confirms their applicability in LEDs. (C) 2014 Elsevier B.V. All rights reserved.