Preparation and properties of Eu2+doped strontium phosphate blue phosphor by Sol-gel method

Abstract

By using strontium carbonate and diammonium hydrogen phosphate as raw materials, the rare earth ion Eu3+doped strontium phosphate blue phosphor was synthesized by sol-gel method. The Eu3+of the intrinsic excitation of red light is reduced to Eu2+of blue light by the redox method of activated carbon. Characterization and spectral testing of the sample by X-Ray diffraction and fluorescence spectrometer, respectively. The effects of different calcination temperature and rare earth ion concentration on the luminescence properties were studied. The spectral test of the sample shows that the Sr2P2O7: Eu2+ has the highest luminescence efficiency at annealing temperature of 800°C, and the luminescent material with doping concentration of 8.0%europium ions demonstrates the highest luminescence intensity. The spectrum of the sample has a strongest blue emission peak at 441.8nm under 368nm UVA excitation, and the luminescence intensity has been increasing with the increase of Eu3+doping concentration. The concentration quenching effect was observed by the fluorescence spectra of the samples.