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Fluorescent substance and light-emitting device prepared from same

A fluorescent substance and light-emitting device technology, applied in the field of white light LED light-emitting, can solve the problems of low luminous efficiency, achieve high color purity, good thermal stability, and improve the effect of luminous intensity

Active Publication Date: 2019-05-28
GRIREM ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, currently limiting MgAl 2 o 4 :Mn 2+ or ZnAl 2 o 4 :Mn 2+ The outstanding problem in the application of fluorescent substances is still its low luminous efficiency

Method used

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  • Fluorescent substance and light-emitting device prepared from same
  • Fluorescent substance and light-emitting device prepared from same
  • Fluorescent substance and light-emitting device prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Accurately weigh 115.21g Al 2 o 3 , 18.45g AlN, 20.69g MnCO 3 and 7.25g MgO were mixed; the above mixture was roasted for 4h under an inert atmosphere at a temperature of 1800°C and a pressure of 0.5Mpa; the above-mentioned roasted product was crushed, classified, and post-treated to obtain the fluorescent substance 0.6MgMn 0.15 Al 2 o 4 0.4(0.72Al 2 o 3 · 0.28AlN).

[0045] For the XRD of the above-mentioned fluorescent substances under the test conditions of the Co target (λ=0.178892nm), see figure 1 The excitation and emission spectra are shown in figure 2 Shown (wherein the excitation wavelength is 460nm, and the detection wavelength of the excitation spectrum is 520nm). From figure 1 It can be seen that the material obtained in Example 1 of the present invention is 0.6MgMn 0.15 Al 2 o 4 0.4(0.72Al 2 o 3 0.28AlN) fluorescent substance, figure 2 It can be seen that the material prepared in Example 1 can emit light of 520 nm under the excitation of 46...

Embodiment 2-15

[0047] According to the steps shown in Example 1, raw materials with corresponding stoichiometric ratios were weighed for roasting and post-treatment to obtain the corresponding phosphor materials shown in Examples 2-15.

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Abstract

The invention provides a fluorescent substance and a light-emitting device prepared from the same. The component of the fluorescent substance is xABmOn.y(aAl2O3.bAlN), wherein A is a combination of two or more selected from elements of Ca, Sr, Ba, Mg, Zn, Mn and Si and must contain the Mn element, B is one or a combination of more than two selected from elements of Al, B and Ga, m is greater thanor equal to 1.8 and less than or equal to 2.2, n is greater than or equal to 3.5 and less than or equal to 4.5, x is greater than or equal to 0.5 and less than or equal to 1, b is greater than or equal to 0.22 and less than or equal to 0.35, x+y is equal to 1, and a+b is equal to 1. The fluorescent substance can emit green light within 510-540 nm under the excitation within 400-470 nm, in addition, the color purity is high, and the application requirements of the white LED device for high-color-gamut liquid crystal display are expected to be met.

Description

technical field [0001] The invention relates to a fluorescent substance and a light-emitting device made thereof, belonging to the field of white light LED light-emitting. Background technique [0002] White LEDs have the advantages of greenness, environmental protection, and long life, and have been widely used in the fields of lighting and display. At present, as far as the production method of white light LED is concerned, it is mainly the realization method of chip matching phosphor powder. Therefore, the luminous performance of phosphor powder directly affects and determines the performance of white light LED devices. [0003] In recent years, a class of MgAl with high melting point, strong stability and adjustable optical bandgap 2 o 4 or ZnAl 2 o 4 As the luminescent matrix, with Mn 2+ Novel MgAl as activator 2 o 4 :Mn 2+ or ZnAl 2 o 4 :Mn 2+ Phosphor powder has attracted much attention, such as: using Mn 2+ Activated MgAl 2 o 4 , ZnAl 2 o 4 It can be...

Claims

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Application Information

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IPC IPC(8): C09K11/62C09K11/63C09K11/64H01L33/50
CPCC09K11/62C09K11/63C09K11/64H01L33/50
Inventor 刘荣辉刘元红邵冷冷马小乐蒋周青
Owner GRIREM ADVANCED MATERIALS CO LTD