Rare earth double primary colour luminescent material for converting white light by utilizing violet light LED (light-emitting diode) and preparation method thereof

A technology of luminescent materials and dichroic colors, which is applied in the direction of luminescent materials, chemical instruments and methods, and the use of gas discharge lamps. It can solve the problems of color space uniformity and failure to meet indoor lighting, etc., and achieve the effect of simple process
CN102229802AInactive Publication Date: 2011-11-02NORTHEAST NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHEAST NORMAL UNIVERSITY
Publication Date
2011-11-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of luminescence and display, relating to blue and yellow luminescent materials in a novel rare earth double primary colour luminescent material for converting white light by utilizing a violet light LED (light-emitting diode). The structural formulas of blue phosphor powder and yellow phosphor powder are MxN(4-x-y)Si3O8Cl4: Ry and WxS(4-x-y)Si3O8Cl4: Yy. Tz, wherein N is Sr element when M is Mg, and the phosphor powder is blue when R is Eu element. When W is Ca, S is Sr element and Y is Eu element, and the phosphor powder is yellow when T is Mn element. Materials are respectively weighed according to mass percent, after fully grinding and evenly mixing, calcining at a high temperature is carried out, a mixture is taken out after cooling is carried out, grinding is carried out, then high temperature calcining is carried out, and a sample is cooled and taken out to be ground, thus a power crystal emitting bright blue light or yellow light under the excitation of violet light is obtained. The blue phosphor powder and the yellow phosphor powder are mixed in a certain proportion to realize white light phosphor powder with different colour temperatures.
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Description

technical field

[0001] The invention belongs to the technical field of luminescence and display, and relates to a rare-earth dichromatic luminescent material for violet LED to convert white light and a preparation method thereof. Background technique

[0002] Due to its small size, low power consumption, long life, less pollution, low heat generation and fast response, white LED has become the first choice for the next generation lighting technology. At present, commercial white LEDs use blue LED chips to excite yellow phosphors to produce white light. Since the blue light emitted by the chips directly participates in the formation of white light, there are serious defects in the uniformity of color space, which cannot meet the needs of indoor lighting. This technical problem can be solved by using violet or near-ultraviolet light, which has little influence on the color coordinates of white light, to excite broad-band blue and yellow dichromatic phosphors to produce white l...

Claims

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