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Sulfoborate phosphor and application thereof

A thioborate and phosphor technology, which is applied in luminescent materials, semiconductor devices, electrical components, etc., can solve the problems of luminous efficiency and temperature quenching characteristics that cannot fully meet practical applications, high cost, and complex circuit design.

Inactive Publication Date: 2014-10-01
王海容
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly three ways to realize white light LED. The first one is to form white light through the combination of red, green and blue LED chips. However, it is difficult to realize white light through this method, because the driving characteristics of three different color chips must be considered. The circuit design is very complicated
The second is to use the quantum effect and use the same semiconductor with different particle sizes to prepare LED chips to achieve white light. The white light LED realized by this method has high efficiency, but the cost is high, and the technology is not yet mature.
[0009] In summary, currently used phosphors cannot fully meet the needs of practical applications in terms of luminous efficiency and temperature quenching characteristics under the excitation of ultraviolet LEDs or blue LEDs. Hotspots

Method used

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  • Sulfoborate phosphor and application thereof
  • Sulfoborate phosphor and application thereof
  • Sulfoborate phosphor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Sr 6.6 MgY 2 B 2 SiO 15 S:Eu 0.4 Phosphor Synthesis:

[0031] In the chemical composition general formula (M 1-a RE a )b+c A b D. x o y E. z , set M=(Sr, Mg, Y), RE=Eu, A=(B, Si), E=S, weigh various raw materials so that the molar ratio of constituent ions is Sr:Mg:Y: B:Si:O:S:Eu=6.6:1:2:2:1:15:1:0.4 (a=0.04, b=3, c=7, x=0, y=15, z=1) .

[0032] Weigh 8.26gSrCO 3 , 1.83gSrSO 4 , 0.4gMgO, 2.25gY z o 3 , 1.2gH 3 BO 3 , 0.6gSiO 2 , 0.7gEu 2 o 3 , after fully grinding and mixing uniformly, put it into an alumina crucible, bake in a reducing atmosphere, and keep warm at 1250° C. for 2 hours to obtain the phosphor. Its excitation and emission spectra are shown in figure 1 , the half-maximum width of the emission spectrum is about 60nm, and the main emission peak is in the red light region of 620nm; the excitation spectrum is a broadband excitation spectrum, and ultraviolet or visible light in the range of 200-500nm can be effectively excited; ...

Embodiment 2～13

[0035] In the chemical composition general formula (M 1-a RE a ) b+c A b D. x o y E. z Among them, set M=(Sr, Ca, Ba, Mg, Zn, Y, La), RE=Eu, A=(B, Si), E=S, according to the concrete chemical formula of each embodiment in table 1, form the title Various raw materials were used, and the preparation process was the same as in Example 1. The luminescent properties of the obtained phosphor are shown in Table 1.

[0036] Table 1 Chemical formulas and luminescent properties of Examples 1 to 13 (excitation wavelength is 460nm)

[0037]

Embodiment 14～28

[0039] In chemical composition general formula M 1-a RE a ) b+c A b D. x o y E. z Among them, set M=(Sr, Ca, Mg, Y), RE=(Eu, Ce, Ho, Er, Nd), A=B, E=S, according to the specific chemical formula composition of each embodiment in Table 2. Various raw materials were used, and the preparation process was the same as in Example 1. The luminescent properties of the obtained phosphor are shown in Table 2.

[0040] Table 2 Chemical formulas and luminescent properties of Examples 14-28 (excitation wavelength is 460nm)

[0041]

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Abstract

The invention relates to a sulfoborate phosphor and an application thereof. The chemical formula of the sulfoborate phosphor is (M1-aREa)b+.AbDxOyEz, wherein M is at least one of Ba, Sr, Ca, Mg, Zn, Sc, Y, Gd, La and Lu; RE is at least one of Eu, Ce, Yb, Dy, Nd, Pr, Sm, Ho, Er, Tb, Mn, Cr, Bi, Pb, Sn, Sb, Ni, Cu and Ag; A is at least one of B and Si and at least contains B; D is at least one of Li, Na, K, Hf, Zr, Ti, Al, Ga, In, Ge, V, Nb and Ta; E is at least one of S, Se, N, F, Cl, Br and OH and at least contains S; O is oxygen; a is greater than 0 but less than or equal to 0.5, b is greater than or equal to 1 but less than or equal to 3, c is greater than or equal to 0 but less than or equal to 300, x is greater than or equal to 0 but less than or equal to 200, y is greater than 0 but less than or equal to 800 and z is greater than 0 but less than or equal to 500. The sulfoborate phosphor provided by the invention is motivated by ultraviolet light and blue light to show a light emitting characteristic of high brightness and an excellent temperature quenching characteristic.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a thioborate phosphor, and also to a light-emitting element, a pigment and an ultraviolet absorber containing the phosphor. Background technique [0002] Phosphors are used in various fields of lighting and display, especially with the development of semiconductor lighting technology, phosphors used in white LEDs have received more and more attention. White LEDs have high photoelectric conversion efficiency, energy saving and environmental protection, long service life, safety and reliability, and are recognized as the next generation of green lighting sources. At present, there are mainly three ways to realize white light LED. The first one is to form white light through the combination of red, green and blue LED chips. However, it is difficult to realize white light through this method, because the driving characteristics of three different color chips must be conside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/84C09K11/67C09K11/63C09K11/86H01L33/50
Inventor 王海容
Owner 王海容