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Oxynitride green emitting phosphor material containing AL element and preparation method thereof

A green fluorescent powder and nitrogen oxide technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high equipment requirements and high synthesis temperature, and achieve the effects of wide process window, widened color gamut, and low raw material prices

Inactive Publication Date: 2011-01-19
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the emission peak of the synthesized product is located at 540nm, it emits blue-green-yellow-green light under the excitation of the ultraviolet-blue chip, which is obviously insufficient for white LEDs for backlights that require high color rendering index, and the synthesis temperature is relatively high. Generally above 1500 ℃, higher requirements for equipment

Method used

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  • Oxynitride green emitting phosphor material containing AL element and preparation method thereof
  • Oxynitride green emitting phosphor material containing AL element and preparation method thereof
  • Oxynitride green emitting phosphor material containing AL element and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] The first step to synthesize the precursor Sr of the green phosphor containing oxynitride of Al element 2 SiO 4 : Weigh SrCO according to the stoichiometric ratio 3 198.17g, SiO 2 60.1g, and accounted for SrCO 3 and SiO 2 3wt% of the total mass of catalyst SrF 2 , after mixing and fully grinding, put it in an alumina crucible, place the crucible in a tube furnace, sinter at 1300°C for 3 hours in a protective gas, and then cool to obtain Sr 2 SiO 4 . Shielding gas can be selected Shielding gas can be selected H 2 , N 2 / H 2 , NH 3 one or a combination of several. Wherein a certain amount of flux can be added, and the flux can be selected from SrF 2 or NH 4 Cl.

[0019] The second step is in the prebody Sr 2 SiO 4 The provided matrix structure is doped with Al element to synthesize the nitrogen oxide green phosphor Sr 0.98 Si 1.7 al 0.3 N 2 o 2 :0.02Eu: According to the stoichiometric ratio, the resulting Sr 2 SiO 4 After grinding and sieving, weigh...

Embodiment 2

[0021] The first step to synthesize the precursor Sr of the green phosphor containing oxynitride of Al element 2 SiO 4 : Weigh SrCO according to the stoichiometric ratio 3 198.17g, SiO 2 60.1g, and accounted for SrCO 3 and SiO 2 3wt% of the total mass of catalyst SrF 2 , after mixing and fully grinding, put it in an alumina crucible, put the crucible in a tube furnace, sinter at 1300°C for 3 hours in a protective atmosphere, and then cool to obtain Sr 2 SiO 4 .

[0022] The second step is in the prebody Sr 2 SiO 4 The provided matrix structure is doped with Al element to synthesize the nitrogen oxide green phosphor Sr 0.98 Si 1.5 al 0.5 N 2 o 2 : 0.02Eu, according to the stoichiometric ratio will be obtained from the first step Sr 2 SiO 4 After grinding and sieving, weigh 5g, and then weigh 0.782g of AlN, α-Si 3 N 4 1.804g and Eu 2 o 3 0.134g, post-adding SrF accounting for 3wt% of the total mass of the aforementioned substances 2 and BaF 2 The mixing aid,...

Embodiment 3

[0024] The first step to synthesize the precursor Sr of the green phosphor containing oxynitride of Al element 2 SiO 4 : Weigh SrCO according to the stoichiometric ratio 3 198.17g, SiO 2 60.1g, and accounted for SrCO 3 and SiO 2 3wt% of the total mass of catalyst SrF 2 , after mixing and fully grinding, put it in an alumina crucible, place the crucible in a tube furnace, sinter in air at 1300°C for 3 hours, and then cool to obtain Sr 2 SiO 4 .

[0025] The second step is in the prebody Sr 2 SiO 4 The provided matrix structure is doped with Al element to synthesize the nitrogen oxide green phosphor Sr 0.98 Si 1.3 al 0.7 N 2 o 2 :0.02Eu: According to the stoichiometric ratio, the Sr obtained in the first step 2 SiO 4 After grinding and sieving, weigh 5g, then weigh 1.095g of AlN, α-Si 3 N 4 1.447g and Eu 2 o 3 0.134g, post-adding SrF accounting for 3wt% of the total mass of the aforementioned substances 2 and BaF 2 The mixing aid, where SrF 2 :BaF 2 = 1:1,...

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Abstract

The invention relates to an oxynitride green emitting phosphor material containing AL element and a preparation method thereof. The preparation method adopts two steps to synthesize oxynitride green emitting phosphor, wherein in the first step, a precursor A2SiO4 of the oxynitride green emitting phosphor containing the AL element is synthesized, wherein A is one of Ca, Ba or Sr element; and in the second step, the AL element is doped in a substrate structure provided by the precursor, and the emission wavelength of the oxynitride green emitting phosphor as shown in Al-x(Si, Al) yOzN2 / 3+4 / 3y-2 / 3z: xEu is modulated by adjusting the proportion of Si and Al elements so that the emission peak of the product is between 520nm and 540nm. In the method, an Al element-doping mode is used to reduce the synthesis temperature of the oxynitride green emitting phosphor. The invention particularly relates to a method for modulating the emission wavelength of the oxynitride green emitting phosphor, and the method is simple and practicable, and is applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to a nitrogen oxide fluorescent powder material and a preparation method thereof, in particular to a method of using a common cheap compound as a raw material and adopting a method of doping Al to reduce the synthesis temperature of the nitrogen oxide green fluorescent powder and to modulate nitrogen oxide A new method for the emission wavelength of biological green phosphors. Background technique [0002] Conventionally, oxide phosphors or sulfide phosphors have been the mainstream in the field of phosphors. In recent years, nitride / oxynitride phosphors have gradually occupied a place in the LED phosphor market due to their excellent performance. The diversity of the nitride / oxynitride phosphor structure determines that it has a variety of luminescent colors, covering almost the entire visible light region; and has a wide excitation range, suitable for blue light, purple light or ultraviolet light excitation; and its stable chem...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 赵莉
Owner IRICO
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