A new phosphor with flower-like structure and luminescent properties of Sr2MgSi2O7: Eu2+, Dy3+ long afterglow materials by sol-gel method

Abstract

The flower-like phosphors of Sr2MgSi2O7: Eu2+, Dy3+ with high brightness and long afterglow were obtained by sol-gel method. X-ray diffraction pattern (XRD) shows that single-phased Sr2MgSi2O7 phosphor is prepared by sol-gel method under 1250 °C. Scanning electron microscope (SEM) indicates that the phosphor consists of nano-sized whiskers which are detected for the first time in Eu2+ and Dy3+ co-doped long-lasting phosphorescence silicates. Furthermore, the investigation on the mechanism indicates that the internal structure and gas, liquid and solid phase effect play important roles in the formation of flower-like Sr2MgSi 2O7: Eu2+, Dy3+ nanostructure. Finally, the optical properties of flower-like Sr2MgSi 2O7 nanostructure have been characterized by photoluminescence (PL) spectra. © 2007 Springer Science+Business Media, LLC.