Gallium germanate-based deep red luminescent material and preparation method thereof

Abstract

The invention discloses a deep red luminescent material. A composition formula of the material is Sr2-aMaLa1-xGa3-bNbGe3-cQc (O1-d+F2D)14 : xEu, wherein the x is the doping amount of Eu, the M is at least one of Ca and Ba, the N is at least one of Al and In, the Q is at least one of Si and Sn, the x is larger than or equal to 0 and smaller than or equal to 1, the a is larger than or equal to 0.001 and smaller than or equal to 0.4, the b is larger than or equal to 0.001 and smaller than or equal to 0.5, the c is larger than or equal to 0.001 and smaller than or equal to 0.5, and the d is larger than or equal to 0.001 and smaller than and equal to 0.1. The preparation method comprises the following steps of evenly mixing raw materials, putting in a crucible and firing for 1 to 4 hours in high temperature of 1000 to 1350 DEG C; breaking, grinding, washing and drying sinter to obtain the luminescent material. The red luminescent material prepared through the method disclosed by the invention has stable performance and high luminescent intensity.

Description

technical field [0001] The invention relates to a luminescent material and a preparation method thereof, in particular to a gallogermanate-based deep red luminescent material and a preparation method thereof. Background technique [0002] With the continuous improvement of living standards, people have higher and higher requirements for the quality of lighting sources, and more and more attention has been paid to the color rendering of lighting sources. In some special industries and places, the requirements for color rendering of lighting sources are more stringent. For example, the fluorescent lamps used in the printing and dyeing industry and color printing industry not only require the general color rendering index Ra>95, but also require R 9 ~R 14 Each special color rendering index also requires >90. In addition there are some locales for R 9 (saturated red) requires its ≥45. Therefore, improving the color rendering of the light source and developing a high c...

AI Technical Summary

Problems solved by technology

However, due to the lack of emission in certain ranges of light sources, the color rendering index Ra cannot reach 100.

For example, in the widely used trichromatic fluorescent lamps, blue-green light of 480-520nm and red light emission of >620nm are lacking, and white LED solid-state lighting sources, which are recognized as next-generation lighting sources after incandescent lamps and fluorescent lamps, also need to improve display efficiency. color index problem

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