Preparation and luminescence properties of LED conversion novel phosphors SrZnO2:Sm

Sm3+-activated SrZnO2 has been synthesized by gel-combusting method and characterized using X-ray powder diffraction, TEM, TG as well as excitation, and emission spectroscopy. The luminescence properties of this phosphor have been studied. A new zincate compound SrZnO2:Sm3+ is obtained. SrZnO2:Sm3+ crystallizes in an orthorhombic structure with Pnma space group and unit cell with the lattice parameters: a = 5.830 Å, b = 3.340 Å and c = 11.348 Å. These materials can be efficiently excited in the UV to visible region (350–420 nm, main peaks 413 and 380 nm), making them attractive as conversion phosphors for LED applications. A red emission at 600–730 nm (main peaks 607 and 655 nm) is observed for SrZnO2:Sm3+ which is the promising conversion phosphor for white-light LEDs.