Rare-earth ion doping SrBr2 glass ceramics and preparation method thereof

Abstract

The invention discloses rare-earth ion doping SrBr2 glass ceramics. The rare-earth ion doping SrBr2 glass ceramics consists of the following components by molar percent: 80 to 89.9 percent of SiO2, 10 to 15 percent of SrBr2 and 0.1 to 5 percent of LnBr, wherein LnBr3 is at least one of YbBr3, ErBr3 and TmBr3. The rare-earth ion doping SrBr2 glass ceramics have advantages of transparency, deliquesce resistance, good mechanical performance and high blue-ultraviolet transmittance, have performances such as low phono energy, high upconversion efficiency and the like and can greatly improve the efficiency of an upconversion laser; moreover, the preparation method of the glass ceramics is simple, and the production cost is relatively low.

Description

technical field [0001] The present invention relates to a rare earth ion doped glass ceramics, in particular to a rare earth ion doped SrBr used as an up-conversion luminescent material 2 Glass-ceramic and its preparation method. Background technique [0002] The up-conversion luminescence of rare earth ions refers to the phenomenon that when a sample doped with rare earth ions is irradiated with excitation light with a longer wavelength, light with a wavelength shorter than that of the excitation light is emitted. Up-conversion lasers in the violet-blue-green band have good application prospects in many aspects such as high-density optical storage, color laser display, ocean water color and marine resource detection. To improve the efficiency of upconversion luminescence, it is necessary to reduce the phonon energy of the host material, mainly because the lower phonon energy can reduce the probability of non-radiative relaxation, improve the fluorescence lifetime of the me...

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Problems solved by technology

SrBr 2 The crystal has lower phonon energy than fluoride, and is more suitable as a rare-earth-doped upconversion luminescent host, and rare-earth ion-doped SrBr 2 crystals have higher upconversion efficiency than fluoride crystals doped with rare earth ions, but SrBr 2 Crystals are easy to absorb moisture, require special handling and storage, are difficult to prepare, and have poor chemical stability and mechanical strength, which affect their practical applications.

But there is no trivalent rare earth ion Yb 3+ 、Er 3+ and Tm 3+ Doped SrBr 2 Published reports on the use of glass-ceramics in upconversion luminescent materials

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