Wavelength conversion substance and application thereof

Abstract

The invention discloses a wavelength conversion substance which comprises fluorescent powder of metal halogen aluminate compound and has the general formula of M<w-p>Al<y>O<z>X<q>:R, wherein the w, the y, the z and the q are all more than 0, the p is more than 0.005 and less than 0.5, the q=2w+3y-2z, the m is at least one element selected from the group including Be, Mg, Ca, Sr, Ba and Zn, X is at least one element selected from the group including F, Cl, Br and I, and the R is one or more transition elements and comprises one lanthanide element; and the wavelength of the light emitted by the fluorescent powder of the metal halogen aluminate compound is 550-650nm covering green light wavelength range and the red light wavelength range, thus the white light obtained by mixing the light with blue light has better color rendering properties. In addition, the invention further discloses a photoelectric element applying the fluorescent powder of the metal halogen aluminate compound.

Description

technical field [0001] The invention provides a wavelength conversion material, especially a fluorescent powder made of metal haloaluminate compound and the application of the metal haloaluminate compound fluorescent powder. Background technique [0002] Using light emitting diodes (Light Emitting Diode) to generate white light similar to the color of sunlight to greatly replace white light lighting such as traditional fluorescent lamps is the goal of active research and development in the field of lighting source technology in this century. The currently known single-chip white LED technology is mainly to use the blue LED chip with a light emission wavelength of 440nm to 460nm to excite yellow light phosphor, and to generate white light through the mixing of blue light and yellow light; although the above method has the advantages of simple preparation and low cost, etc. However, the color saturation and color rendering of the white light produced are still far from sunligh...

AI Technical Summary

Problems solved by technology

The currently known single-chip white LED technology is mainly to use the blue LED chip with a light emission wavelength of 440nm to 460nm to excite yellow light phosphor, and to generate white light through the mixing of blue light and yellow light; although the above method has the advantages of simple preparation and low cost, etc. , but the color saturation and color rendering of the white light produced are still far from sunlight

[0003] In recent years, ultraviolet light-emitting diode (UV-LED) chips with emission wavelengths from 360nm to 400nm have also been developed to excite phosphors of three different light colors, red (R), green (G) and blue (B), and mix to form white light. The above-mentioned method has the advantages of high luminous efficiency, high color rendering, and many phosphors that can be matched. However, in the production process, it is necessary to mix several kinds of phosphors that are properly matched to control the quality of the white light source. high difficulty

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