Synthesis And Luminescent Properties Of Rare Earth Ions Doped Pyrophosphate Red Phosphors

Luminescent materials have been widely used in lighting display, medical detection, luminous simulate natural light and other fields. Rare earth ions doped pyrophosphate phosphors have some excellent properties such as easy mass production, nontoxic, fast response, high efficiency as well as their energy saving properties.In this paper,the rare earth ions or transition metal ions activated pyrophosphate phosphors were synthesized by different methods. Their structure and luminescent properties were investigated. The main research content is as follows:1. A series of Sr2P2O7: Sm3+ phosphors were prepared by the high temperature solid-state and co-precipitation microwave assisted method. The influencing factor of the doping concentrations of Sm3+ ions, synthetic conditions, fluorescent thermal stability and other factors that affect luminescence properties were systematically investigated. Compared the two kinds of preparation methods, the luminous intensity of samples prepared by solid statehigh temperature methodis high, the samples prepared byco-precipitation microwave assisted method have small and uniform particle size distribution.2. The red phosphor, Sr2P2O7: Mn2 +, Dy3 + was prepared by solid state reaction method and microwave assisted co-precipitation method under 95% N2-5% H2 atmosphere. The synthetic conditions, influencing factor of the Mn2+ and Dy3+ doping concentrations, microstructure, thermal stability and luminescence properties of Sr2P2O7:Mn2+, Dy3+phosphors were systematically investigated. The luminescence spectra of Mn2+ and Dy3+ co-doped Sr2P2O7 shows the luminous intensity is higher than Sr2P2O7: Dy3+, Sr2P2O7:Mn2+. Therefore, it is expected that an effective resonance-type energy transfer from Mn2+-Dy3+.3. A series of orange-red phosphor Sr ZnP2O7: Sm3+ phosphors were synthesized by traditional solid-state reaction method. The influencing factor of the doping concentrations, calcination conditions and luminescence properties of phosphors were systematically investigated.4. The emission intensity can be enhanced by introducing the charge compensator R+(R=Li, Na, K) into Sr2P2O7: Sm3+ and SrZnP2O7: Sm3+ luminescence materials. The concentration of charge compensation agent can affect the emitting of Sr2P2O7: Sm3+ and SrZnP2O7: Sm3+.