Properties of Sr2.13Ba0.8SiO5:0.07Eu2+ phosphor synthesized by microwave assisted with SiC method

Abstract

Nano-sized Sr2.13Ba0.8SiO5:0.07Eu2+ yellow phosphor was synthesized by microwave assisted with SiC method (MASM). The phase, morphology, luminescence properties and formation mechanism of nano-particles were studied. Results indicate that the phosphor is a tetragonal system with space group P4/ncc (130). The SEM shows a smooth surface and regular morphology with homogeneous size distributed from 80 to 100 nm. The formation of nano-sized particles ascribed to the interaction of microwave and reactive material, and that is the high speed vibration of product particles induced by microwave interaction inhibits the growth of the crystal grain size. The excitation spectrum is a broad band spectrum from 250 to 550 nm, which attributed to 4f–5d transition of Eu2+ ions. The emission spectrum excited at 460 nm is a broad band peaking at 577 nm attributed to the transition of 4f65d → 4f7(8S7/2) of Eu2+ ions. The color temperature and color coordinate of white LED prepared with the phosphor are 2658 K and (x = 0.3976, y = 0.2955) respectively.