Preparation and luminescence properties of LED conversion novel phosphors SrZnO_2:Sm

摘要

Sm~(3+)-activated SrZnO_2 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 SrZnO_2:Sm~(3+) is obtained. SrZnO_2:Sm~(3+) crystallizes in an orthorhombic structure with Pnma space group and unit cell with the lattice parameters: a=5.830 A, b=3.340 A and c= 11.348 A. 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 SrZnO_2:Sm~(3+) which is the promising conversion phosphor for white-light LEDs.