Up-conversion luminescence performance of Yb 3+ , Er 3+ /Ho 3+ co-doped Y 2 W 3 O 12 phosphors

In this paper, Yb 3+ -Er 3+ and Yb 3+ -Ho 3+ co-doped Y 2 W 3 O 12 phosphors were prepared by high temperature solid state method. The crystal structure, fluorescence properties and fluorescence decay time of phosphors were characterized by X-ray diffraction, Energy dispersive spectroscopy, Fourier transform infrared spectroscopy and Photoluminescence spectra. The results show that Yb 3+ , Ho 3+ and Er 3+ ions enter the Y 2 W 3 O 12 lattice successfully with + 3 valence state and replace the Y 3+ ions in the lattice. Under 980 nm laser excitation, 20%Yb 3+ -1%Er 3+ and 8%Yb 3+ -1%Ho 3+ are the best combination of ion doping concentration. The emission spectra of Yb 3+ -Er 3+ : Y 2 W 3 O 12 phosphor showed strong green emission and weak red emission, and the emission spectra of Yb 3+ -Ho 3+ : Y 2 W 3 O 12 phosphor showed typical green emission and red emission, and there was an obvious energy transfer process of Yb 3+ → Er 3+ and Yb 3+ → Ho 3+ . These studies show that Yb 3+ -Er 3+ /Ho 3+ : Y 2 W 3 O 12 materials can be efficiently applied in up-conversion luminescence field, and have good prospects for application in laser, anti-counterfeiting, lighting and other technologies.