Novel Sm3+ and Eu3+ co-doped Sr2YNbO6 red-emitting phosphor for white LED applications

Abstract

A series Sm${}^{3+}$ and Eu${}^{3+}$ co-doped Sr${}_2$YNbO${}_6$ phosphors were prepared by high temperature solid state reaction method in this work. The photoluminescence properties and energy transfer process were studied, and the results revealed that the photoluminescence intensity was significantly enhanced by co-doped with Eu${}^{3+}$, with the optimal concentration of 0.15mol, and the energy transfer efficiency between Sm${}^{3+}$ and Eu${}^{3+}$ ions was as high as 94.25%. In addition, the diffuse reflectance spectrum results confirmed the excitation wavelength of the sample, and the optical band gap showed concentration dependence. Finally, the lower color temperature CCT=2502K and the higher color rendering index Ra=76.4 indicate that the material has potential application value in the fields of LED and anti-counterfeiting display.