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Yellow luminescent material with voelckerite structure and preparation method thereof as well as white light-emitting diode device

A technology of oxyapatite and fluorescent materials, which is applied in the field of yellow light fluorescent materials, can solve the problems of not being able to meet the optimum requirements of white light and insufficient color rendering properties in the red light region

Inactive Publication Date: 2014-12-17
SPRING FOUND OF NCTU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the light color quality of white light diodes still needs to be improved in white hue tunability, color temperature and color rendering properties, and these properties are related to daily lighting
[0003] Most of the fluorescent materials currently used in white light diodes cannot meet the optimum requirements for white light, and the color rendering properties in the red light region are quite insufficient.

Method used

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  • Yellow luminescent material with voelckerite structure and preparation method thereof as well as white light-emitting diode device
  • Yellow luminescent material with voelckerite structure and preparation method thereof as well as white light-emitting diode device
  • Yellow luminescent material with voelckerite structure and preparation method thereof as well as white light-emitting diode device

Examples

Experimental program
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preparation example Construction

[0032] Preparation method of yellow fluorescent material with oxyapatite structure

[0033] The above (A 1-x Eu x ) 8-y B 2+y (PO 4 ) 6-y (SiO 4 ) y (O 1-z S z ) 2 For the preparation method of yellow fluorescent material, please refer to figure 1 , which is a flowchart showing the preparation of a yellow fluorescent material with an oxyapatite structure.

[0034] exist figure 1 In step 110, according to the chemical formula of the above-mentioned yellow fluorescent material to be synthesized, the raw materials that meet the stoichiometric ratio are respectively weighed. For the metal ions of Eu, A and B, corresponding metal oxides can be selected as their sources. If the metal ions of Eu, A and B have carbonate, the corresponding metal carbonate can also be selected as its source. For example, calcium ions can choose calcium oxide or calcium carbonate as their source, and europium ions can choose Eu 2 o 3 for its source. In terms of phosphate, diammonium hydr...

Embodiment 1

[0037] Example one: at Ca 8 La 2 (PO 4 ) 6 o 2 Incorporation of different proportions of Eu 2+

[0038] First, in Ca 8 La 2 (PO 4 ) 6 o 2 Incorporation of different proportions of Eu 2+ to replace Ca 2+ , forming a series of (Ca 1-x Eu x ) 8 La 2 (PO 4 ) 6 o 2 Fluorescent material (in this embodiment, denoted as Ca 8 La 2 (PO 4 ) 6 o 2 :xEu 2+ ), to observe its photoluminescent properties. In this experimental example, (A 1-x Eu x ) 8-y B 2+y (PO 4 ) 6-y (SiO 4 ) y (O 1-z S z ) 2 A of the 2+ for Ca 2+ , B 3+ for la 3+ , and y=z=0, and x are 0, 0.001, 0.003, 0.005, 0.007, 0.010, 0.020, 0.030, 0.050, 0.070 and 0.100, respectively.

[0039] figure 2 , 3 , 4 and 5 are respectively the powder X-ray diffraction spectrum, photoexcitation spectrum, photoluminescence spectrum and UV-Vis solid-state reflectance spectrum of this series of compounds. Depend on figure 2 It can be seen that Eu 2+ The doping amount up to 10mol% does not change t...

Embodiment 2

[0042] Example 2: Using different A 2+ to synthesize (A 1-x Eu x ) 8 B 2 (PO 4 ) 6 o 2

[0043] When y=z=0, (A 1-x Eu x ) 8 B 2 (PO 4 ) 6 o 2 chemical general formula. The experimental examples synthesized here are A 2+ Has 0.89mol% Ca 2+ , and 10mol% Mg 2+ 、Sr 2+ 、Ba 2+ , Mn 2+ , Zn 2+ , while Eu 2+ The doping ratio is 1mol%. B 3+La 2+ .

[0044] In Table II, list the above Mg 2+ 、Sr 2+ 、Ba 2+ , Mn 2+ , Zn 2+ The eight-coordinated ion radius and the related photoluminescence data of the above experimental example. It can be seen from the data in Table 2 that although the replaced A 2+ The ionic radii range from 89pm to 142pm, but the range of light emission and the wavelength of light emission are roughly the same. This result shows that substituting different A 2+ ion, for (Ca 0.89 A 0.1 Eu 0.01 ) 8 La 2 (PO 4 ) 6 o 2 The photoexcitation and photoluminescence properties have little effect.

[0045] exist Figures 7A-7E In , the pho...

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Abstract

The invention provides a yellow luminescent material with a voelckerite structure and a preparation method thereof as well as a white light-emitting diode device. The yellow luminescent material has a chemical general expression of (Al-xEux)8-yB2+y(PO4)6-y(SiO4)y(O1-zSz)2, wherein A and Eu are divalent metal ions, B is a trivalent metal ion, x is greater than 0 and less than or equal to 0.6, y is greater than or equal to 0 and less than or equal to 6, z is greater than or equal to 0 and less than or equal to 1, A can be alkaline earth metal, Mn or Zn, and B can be a metal in the group IIIA, rare earth metal or Bi.

Description

technical field [0001] The present invention relates to a yellow light fluorescent material, and in particular to a yellow light fluorescent material in the form of oxyapatite. Background technique [0002] Commercial white light-emitting diodes (WLEDs) have come a long way since the invention of InGaN-based photoluminescent chips in the early 20th century. By combining the blue light emitted by the InGaN chip and the Y 3 Al 5 o 12 : Ce 3+ (YAG:Ce 3+ ) The yellow light emitted by the main material, the white light obtained has surpassed the incandescent bulb, and can even be compared with the traditional fluorescent lamp. Compared with traditional light sources, white light diodes are energy-saving, long-lived and environmentally friendly light sources. However, the light color quality of white light diodes still needs to be improved in terms of white hue tunability, color temperature and color rendering properties, and these properties are all related to daily lightin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/84C09K11/81H01L33/00H01L33/50
Inventor 陈登铭黄健豪
Owner SPRING FOUND OF NCTU