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Nitrogen oxide fluorescent powder for near ultraviolet excitation and preparation method thereof

A nitrogen oxide and near-ultraviolet technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of harsh synthesis conditions and late start, and achieve the effect of simple and feasible manufacturing method, easy operation and high matching degree

Active Publication Date: 2013-11-20
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the harsh synthesis conditions of nitrogen oxide-based luminescent materials and a late start, current research mainly focuses on nitride systems that can be effectively excited by blue light, while there are relatively few reports on highly efficient nitrogen oxide-based luminescent materials for near-ultraviolet excitation.

Method used

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  • Nitrogen oxide fluorescent powder for near ultraviolet excitation and preparation method thereof
  • Nitrogen oxide fluorescent powder for near ultraviolet excitation and preparation method thereof
  • Nitrogen oxide fluorescent powder for near ultraviolet excitation and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] weigh Y 2 o 3 55.89 grams, Al 2 o 3 5.10 g, α-Si 3 N 4 7.01 g, CeO 2 0.86 g, AlF 3 1.36 grams, fully ground and mixed, put into an alumina crucible, cover the crucible lid, put into a high temperature furnace, under the condition of 1550 ℃, 10%-H 2 / N 2 Roasting under the atmosphere for 10 hours, take it out when cooled to room temperature, grind and disperse, then soak and wash with a hydrochloric acid solution with a mass concentration of 2%, then wash with deionized water until the pH value is neutral, and dry; Nitride phosphor excited in the near ultraviolet, its composition is Y 9.90 Ce 0.10 Al 2 Si 3 o 12 N 4 . For the XRD spectrum of the phosphor see figure 1 , and the emission and excitation spectra, respectively, see image 3 with Figure 4 .

Embodiment 2

[0043] weigh Y 2 o 3 55.61 grams, Al 2 o 3 5.10 g, β-Si 3 N 4 7.01 g, CeO 2 1.29 grams, from 0.1 grams, fully ground and mixed, put into an alumina crucible, cover the crucible lid, put into a high-temperature furnace, under the condition of 1500 ℃, 5%-H 2 / N 2 Roasting under the atmosphere for 12 hours, take it out when cooled to room temperature, grind and disperse, then soak and wash with a sulfuric acid solution with a mass concentration of 10%, then wash with deionized water until the pH value is neutral, and dry; Nitride phosphor excited in the near ultraviolet, its composition is Y 9.85 Ce 0.15 Al 2 Si 3 o 12 N 4 .

Embodiment 3

[0045] weigh Y 2 o 3 55.89 grams, La 2 o 3 0.41 g, Al 2 o 3 5.10 g, α-Si 3 N 4 7.01 g, CeO 2 0.86 g, NH 4 F0.7 grams, fully ground and mixed, put into an alumina crucible, cover the crucible lid, put into a high temperature furnace, under the condition of 1600 ℃, 20%-H 2 / N 2 Roasting under the atmosphere for 8 hours, take it out when cooled to room temperature, grind and disperse, then soak and wash with a sulfuric acid solution with a mass concentration of 3%, then wash with deionized water until the pH value is neutral, and dry; Nitride phosphor excited in the near ultraviolet, its composition is Y 9.85 La 0.05 Ce 0.10 al 2 Si 3 o 12 N 4 .

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Abstract

The invention relates to a nitrogen oxide fluorescent powder for near ultraviolet excitation. The nitrogen oxide fluorescent powder has a chemical structural formula of A10-xD2Si3O18N4: Hx(1), wherein x is greater than 0 and smaller than or equal to 0.50, A is any combination of one or more than two selected from Y, La, Gd and Lu, D is any combination of one or more than two selected from B, Al, Ga and In, and H is Ce, or codoping of Ce and Tb, Eu, Pr and Dy. The invention further relates to a preparation method of the nitrogen oxide fluorescent powder. The nitrogen oxide fluorescent powder relates to a nitrogen oxide system, and the physical, chemical and thermally stable performances of the nitrogen oxide fluorescent powder are prior to those of the traditional oxide system; with wider range of excitation spectrum, the excitation spectrum has strong absorption at 380-410 nm and has higher matching degree with the emission spectrum of a commercial near ultraviolet chip; the emission spectrum can cover the whole visible region. A manufacturing method of the nitrogen oxide fluorescent powder disclosed by the invention is simple and effective, and is easy to operate, free of pollution and low in cost.

Description

technical field [0001] The invention relates to a fluorescent powder and a preparation method thereof, in particular to a nitrogen oxide fluorescent powder for near-ultraviolet excitation and a preparation method thereof Background technique [0002] Due to the advantages of high luminous efficiency, small size, energy saving, long life, and no pollution, LEDs have been widely used in LCD backlights, indicator lights, and general lighting, and are expected to replace various bulbs currently in use. And fluorescent lamps become a new generation of green lighting sources. [0003] White LEDs can be obtained by combining blue LEDs with phosphors. Currently, YAG:Ce 3+ The combination of fluorescent materials and blue LEDs achieves white light through the principle of complementary colors. However, due to the insufficient red component in the phosphor, the color rendering is poor. Recently, the concept of using "blue light chip + yellow phosphor" to realize white light has gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 何锦华梁超符义兵
Owner JIANGSU BREE OPTRONICS CO LTD
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