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Composite fluorescent material and preparation method thereof

A compound fluorescence and compound technology, which is applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of large fluctuations in luminous brightness and chromaticity coordinates of materials, and large uncertainties in metering ratios, etc., to achieve luminescence The effect of strength improvement and heat decay resistance enhancement

Active Publication Date: 2013-07-03
邓华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall performance of this material is good, but the uncertainty of its metering ratio is large, which makes the luminous brightness and chromaticity coordinates of the material fluctuate greatly.

Method used

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  • Composite fluorescent material and preparation method thereof
  • Composite fluorescent material and preparation method thereof
  • Composite fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Proportion: SiO 2 1.95Sr 0.487 Ba 0.513 o 0.949 f 0.103 0.05EuO / 0.031Au. Weigh various raw materials whose purity is analytically pure: SiO 2 4.35 g, SrCO 3 10.17 g, BaCO 3 14.30 g, NH 4 F 0.54 g, Eu 2 o 3 0.64g, mix the above raw materials thoroughly, grind evenly, then weigh 0.45g of high-purity Au powder with a particle size of 10-1000nm, put it into the mixture, mix well and grind evenly, then put it into an alumina crucible, put Into the pressure heat treatment furnace, in high-purity N 2 and H 2 Sintering at 1000-1600° C. for 4-8 hours under mixed atmosphere and 0-3 atmospheric pressure. The sintered powder is light green and emits green light with a peak emission wavelength of 520nm. For the excitation and emission characteristics of the sample, see figure 2 .

Embodiment 2～9

[0082] Proportion: SiO 2 1.95Sr 0.795 Ba 0.205 o 0.949 f 0.103 0.05EuO / xAu, 0.01≤x≤0.059. Weigh the ratio as SiO 2 4.69 g, SrCO 3 17.87 g, BaCO 3 6.17 g, NH 4 F 0.58 g, Eu 2 o 3 0.69 grams of raw materials with a purity of analytically pure eight parts each, weighing 0.15 grams, 0.23 grams, 0.3 grams, 0.38 grams, 0.45 grams, 0.6 grams, 0.75 grams and 0.9 grams of high-purity Au powders with a particle size of 10-1000 nm gram, and then the preparation methods and steps of samples with different Au content are the same as in Example 1. The sintered powder is yellow and emits yellow light. See Table 1 for the emission characteristics of each embodiment and the amount of Au added. As a control, a sample SiO without Au was also prepared 2 1.95Sr 0.795 Ba 0.205 o 0.949 f 0.103 • 0.05EuO (x=0, labeled c1). The emission spectra of several typical samples in Examples 2-9 under the excitation of 460nm blue light are shown in image 3 .

[0083] image 3 In , compare...

Embodiment 10

[0087] Proportion: SiO 1.55 N 0.3 1.95Sr 0.487 Ba 0.513 o 0.923 f 0.154 0.05EuO / 0.032Au. Weigh each raw material whose purity is analytically pure by measurement: SiO 2 3.37 g, Si 3 N 4 0.76 g, SrCO 3 10.15 g, BaCO 3 14.28 g, NH 4 F 0.80g, Eu 2 o 3 0.64g, mix the above raw materials thoroughly, grind evenly, then weigh 0.45g of high-purity Au powder with a particle size of 10-1000nm, put it into the mixture, mix well and grind evenly, then put it into an alumina crucible, put Into the pressure heat treatment furnace, in high-purity N 2 and H 2 Sintering at 1000-1600° C. for 4-8 hours under mixed atmosphere and 0-3 atmospheric pressure. The sintered powder is light green and emits green light with a peak emission wavelength of 523nm. For the excitation and emission characteristics of the sample, see Figure 4 .

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Abstract

The invention provides a group of composite fluorescent materials and a preparation method thereof. A fluorescent complex is composed of a fluorescence main phase and a second phase, wherein the fluorescence main phase takes oxygen as a main anionic ligand and rare earth as activated ions, and the second phase is inert elemental metal including Au, Ag, Pd, Pt, Rh, Ir, Ru, Os and the like. Low phonon energy inert elemental metals are distributed in main phase domain or on domain boundary of the fluorescence main phase domain structure in the form of a second phase micro-domain, so that the light intensity and the anti-heat damping capacity of the fluorescence main phase is improved. Part of oxygen in the complex fluorescent main phase lattice can be replaced by trivalent nitrogen ions and monovalent halogen ions together to adjust the micro crystal field environment in the lattice to achieve fine adjustment of the emission wavelength. The composite fluorescent material is prepared by a solid phase reaction process using the microparticles of the inert elemental metals as a seed crystal, can be excited by UV-blue-green light to obtain emission from blue to orange light, and can be applied to manufacturing efficient LED devices.

Description

technical field [0001] The invention relates to a group of novel composite fluorescent materials for semiconductor light-emitting devices, which can be excited by ultraviolet-blue-green light chips with emission wavelengths in the range of 300-500 nm, absorb at least part of the light emitted by the excitation light source, and emit at a wavelength of 450 nm The blue light or green light or yellow light or orange-red light within the range of ~600nm belongs to the field of lighting technology, display and optoelectronics. Background technique [0002] The semiconductor lighting and display technology realized by using light-emitting diodes has many advantages such as extremely small power consumption, environmental friendliness, long life and flexible application. At present, the way to realize semiconductor lighting and display is mainly based on phosphor conversion technology that uses ultraviolet light, purple light or blue-green light chips to excite various colors of fl...

Claims

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Application Information

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IPC IPC(8): C09K11/61C09K11/87H01L33/50
Inventor 刘海军
Owner 邓华
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