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Phosphors, fabricating method thereof, and light emitting device employing the same

a technology of phosphor and phosphor, which is applied in the direction of luminescent dosimeters, optical radiation measurement, instruments, etc., can solve the problems of over-excess carbon generated by crn method but also under atmosphere, and achieve the effects of increasing the crystallinity of phosphor and improving illumination efficiency. , the effect of increasing the integrity of the surfa

Inactive Publication Date: 2015-07-16
CHUNG YUAN CHRISTIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a new phosphor material that can be red, green, yellow, or blue in color. The phosphor is made by doping metal oxides, carbonates, and rear-earth oxides with nitrogen sources like organic compounds or inorganic compounds. The process expands the crystal structure, makes the surface smoother, and increases the lattice integrity and crystallinity of the phosphor. This improves the efficiency with which it emits light. The phosphor can be combined with other phosphors to create a white light-emitting device. The patent also suggests that the same doping process can be applied to commercially available phosphor materials, improving their quantum and package efficiency.

Problems solved by technology

In addition, the nitridation of the doping process did not only cause the excessive carbon which is generated by CRN method but also perform under atmosphere.

Method used

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  • Phosphors, fabricating method thereof, and light emitting device employing the same
  • Phosphors, fabricating method thereof, and light emitting device employing the same
  • Phosphors, fabricating method thereof, and light emitting device employing the same

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Experimental program
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first embodiment

[0029]the present invention provides a phosphor and the preparation method, and the preparation method as follows.

[0030]First, the weighed 0.3980 g yttrium oxide (Y2O3), 0.3186 aluminum oxide (Al2O3), 0.0387 g CeO3, 0.0091 g BaF3, and 0.0091 g (1.2 wt %) H3BO3 to evenly mix and is grounded. Then, the mixture is disposed into the crucible. The mixture in the crucible is displaced in a high temperature furnace and is performed with a sintering process at temperature which ranges from 200 to 1600° C. and sintering duration ranges from 0.5 to 48 hrs under N2 (nitrogen gas), H2 (hydrogen gas) / N2 (nitrogen gas) or Ar (argon) / N2 (nitrogen gas) reduction environment, in which the preferred sintering duration is about 8 hours. Then, the pure phase phosphor with chemical formula can be expressed as Y3Al5O12:Ce3+ that is obtained from the high temperature furnace.

[0031]Next, the pure phase Y3Al5O12:Ce3+ phosphor is excited by the light source with 460 nm wavelength to obtain the data for an il...

fourth embodiment

[0048]As shown in FIG. 1, the thirty-fourth embodiment of the present invention provides a first luminous device 10 which includes a lamp tube 12, a first fluorescence excitation light source 16, an electrode 18 and a wavelength conversion element 14. the first fluorescence excitation light source 16 and the electrode 18 are disposed on two sides of the lamp tube 12, in which the first fluorescence excitation light source 16 can be light emitting diode (LED), laser diode (LD), organic light emitting diode (OLED), cold cathode fluorescent lamp (CCFL), external electrode fluorescent lamp (EEFL), or vacuum ultra violet (VUV). The wavelength conversion element 14 is a phosphor material which is coated on an inner wall (not shown) of the lamp tube 12 to absorb the excitation light source to emit the visible light. In one preferred embodiment, the phosphor material is partially coated on the inner wall of the lamp tube 12. It is noted to illustrate the phosphor material which is coated on...

fifth embodiment

[0049]As shown in FIG. 2, the thirty-fifth embodiment of the present invention provides a second luminous device 100 which includes a second fluorescence excitation light source 102, a lead frame 104, a phosphor material 106, a transparent resin 108 and a package material 110. The LED or LD is used as the second fluorescence excitation light source 102 for the second luminous device 100. The second fluorescence excitation light source 102 is disposed on the lead frame 104 and the second fluorescence excitation light source 102 is encapsulated by the transparent resin 108 mixed with the phosphor material 106. The package material 110 is used to encapsulate the second fluorescence excitation light source 102, the lead frame 104 and the transparent resin 108.

[0050]The present invention mainly provides the yellow phosphor material and the preparation method thereof, but it did not limit in yellow phosphor material and the preparation method. The preparation method and the structure for ...

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Abstract

A phosphor material is provided which having the chemical formula is (Ln1-x-y-zCex)3Al5O12-y-zCyNz, wherein Ln is one or more metals selected from Y, La, Pr, Nd, Eu, Gd, Tb, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni and Lu, and 0.01≦x≦0.3, 0≦y≦0.3, and 0.001≦z≦0.3. Before the sintering process with high temperature is performed, the different kinds of nitrogen source or the combination of nitrogen source and carbon source thereof is added into the synthesized phosphor to provide carbon atom (C) and nitrogen atom (N) that is doped into the phosphor material, in which the nitrogen source includes an organic and an inorganic nitrogen compound. The nitrogen source is added in addition to substitute oxygen atom and to perform doping process.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a phosphor material and the forming method thereof, and more particularly to a phosphor material with carbon and nitrogen co-doping and an application of phosphor material to improve the luminous efficiency of the light emitting component.[0003]2. Description of the Prior Art[0004]Currently, for the light emitting diodes (LED) application, the white luminous device will gradually replace the traditional tungsten lamp and fluorescent lighting, because of the following characteristics (1) Small size and suitable for the illumination of array package and can apply for any combination of different colors; (2) Long usage life, the usage life can be up to 10,000 hours, and is longer than traditional incandescent light bulbs for more than 50 times; (3) Durable, the encapsulation of white luminous device is transparent resin which can use for the shock resistance and impact resistance; (4) Envir...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K11/77
CPCC09K11/7774C09K11/7792C09K11/77746
Inventor LIU, WEI-JENLIN, PIN-CHUN
Owner CHUNG YUAN CHRISTIAN UNIVERSITY