Efficient red fluorescent material and preparation method thereof

Abstract

The invention discloses an efficient red fluorescent material which is excited by an LED (light-emitting diode) chip from near ultraviolet to purple light. The composition of the efficient red fluorescent material is as follows: La[3-y]BW[1-x]MoxO9:Eu<3+>y, wherein x is smaller than or equal to 0.5 and greater than or equal to 0, and y is smaller than or equal to 1.5 and greater than or equal to 0. The invention also discloses a preparation method and a performance research result of the fluorescent material. The fluorescent material has strong broadband excitation in an area from ultraviolet to purple lights, has a sharp line excitation peak at the blue light position of 466nm, and is matched with the chip from the near ultraviolet to ultraviolet purple light and the blue light chip in the market respectively; a sharp line red light of which the main peak is 618nm is emitted; the color purity is high. Compared with the red phosphor in the market, the efficient red fluorescent material has the advantages of simple and mild preparation condition, good stability, low preparation cost and the like, so that the material has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of rare earth fluorescent materials, and in particular relates to a high-efficiency red fluorescent powder and a preparation method thereof. The red fluorescent powder is composed of rare earth tungsten (molybdenum) borate, and the molecular formula is La 3-y BW 1-x Mo x o 9 : Eu 3+ y (0≤x≤0.5,0≤y≤1.5). Background technique [0002] White light LED is known as the fourth generation lighting source for its small size, low energy consumption, fast response, long life, and no pollution. The current traditional commercial white light emission solution is: blue LED plus YAG:Ce yellow phosphor, because of the lack of red light components in its emission spectrum, resulting in a high color temperature and poor color rendering. In response to the above problems, people are turning their attention to violet LED chips with shorter wavelengths, but currently there are limited red phosphors that can be excited by violet lig...

AI Technical Summary

Problems solved by technology

At present, the traditional commercial solution to realize white light emission is: blue LED plus YAG: Ce yellow phosphor, because of the lack of red light components in its emission spectrum, resulting in high color temperature and poor color rendering

In response to the above problems, people turn their attention to purple LED chips with shorter wavelengths, but currently there are limited red phosphors that can be excited by purple light, so the development of high-efficiency red phosphors that can be effectively excited by near ultraviolet and ultraviolet light has become a hot spot in recent years.

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