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Red phosphor based on ultraviolet light excitation

A technology of red phosphor powder and phosphor powder, applied in the field of red phosphor powder, can solve the problems of low color rendering index and inability to synthesize single white light, etc., and achieve the effect of improving the emission intensity

Inactive Publication Date: 2013-07-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem in the prior art that the red light component of the emission spectrum is less, so that the color rendering index is low, and a single white light cannot be synthesized, and a red fluorescent powder based on ultraviolet light excitation is provided.

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  • Red phosphor based on ultraviolet light excitation
  • Red phosphor based on ultraviolet light excitation
  • Red phosphor based on ultraviolet light excitation

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Weigh 9molBaCO according to molar ratio 3 , 0.99molSc 2 o 3 , 0.02molCeO 2 , 6mol SiO 2 After mixing and grinding evenly, put it in a high-purity corundum crucible, put it into a high-temperature muffle furnace for roasting under the condition of hydrogen reducing atmosphere, and roast it at 1100°C for 3 hours to get Ba 9 (Sc 0.99 Ce 0.01 ) 2 (SiO 4 ) 6 Phosphor.

[0018] Embodiment 1 provides the rare earth ion Ce 3+ Ba alone activated 9 sc 2 (SiO 4 ) 6 , the resulting emission and excitation spectra of the phosphor are given by figure 1 As shown in (a), it can be seen that Ce 3+ Under the excitation of 280-350nm ultraviolet light, it can emit blue-violet light with a wavelength range of 350-450nm and a peak value of 383nm, and the luminescence is strong.

Embodiment 2

[0020] Weigh 8.91molBaCO according to molar ratio 3 , 0.09molMnCO 3 , 1molSc 2 o 3 , 6mol SiO 2 After mixing and grinding evenly, put it in a high-purity corundum crucible, put it into a high-temperature muffle furnace for roasting under the condition of hydrogen reducing atmosphere, and roast it at 1100 ° C for 3 hours to obtain (Ba 0.99 mn 0.01 ) 9 sc 2 (SiO 4 ) 6 Phosphor.

[0021] Embodiment 2 provides the transition group metal ion Mn 2+ Ba alone activated 9 sc 2 (SiO 4 ) 6 , the resulting emission and excitation spectra of the phosphor are given by figure 1 As shown in (b), it can be seen that Mn 2+ Under the excitation of 300-450nm wavelength, it can emit red light with a wavelength range of 580-650nm and a peak value of 610nm, but at this time Mn 2+ The red light emission is relatively weak.

[0022] figure 1 It can also be seen that Ce 3+ The emission spectrum and Mn 2+ The excitation spectra of the overlap, so in the Ce 3+ and Mn 2+ co-activated...

Embodiment 3

[0024] Weigh 8.991molBaCO according to molar ratio 3 , 0.009molMnCO 3 , 0.95molSc 2 o 3 , 0.1mol CeO 2 , 6mol SiO 2After mixing and grinding evenly, put it in a high-purity corundum crucible, put it into a high-temperature muffle furnace for roasting under the condition of hydrogen reducing atmosphere, and roast it at 1100 ° C for 3 hours to obtain (Ba 0.999 mn 0.001 ) 9 (Sc 0.95 Ce 0.05 ) 2 (SiO 4 ) 6 Phosphor.

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Abstract

A red phosphor base on ultraviolet light excitation belongs to the technical field of luminescence, and solves a problem in prior art that an emission spectrum has little red light component, so that the emission spectrum has low colour rendering index and can not synthesize single white light. A chemical formula of a material is (Ba1-xMnx)9(Sc1-yCey)2(SiO4)6, wherein an x and a y are mol fraction and satisfy relations of: 0.001<=x<=0.3, and 0.0001<=y<=0.2. Materials are ground, uniformly mixed and placed in a crucible, and placed in a high temperature furnace in a reducing atmosphere to obtain the phosphor. The phosphor can emit red light with a center wavelength of 610nm, under effective excitation of 280-350nm ultraviolet light; the 610nm red light emission can be enhanced substantially through energy transmission from Ce<3+> to Mn<2+> and regulation of a proportion of Ce<3+> to Mn<2+>. The red phosphor can be used in an ultraviolet base three primary color white light LED (Light Emitting Diode) phosphor.

Description

technical field [0001] The invention relates to the technical field of light emission, in particular to a red fluorescent powder excited by ultraviolet light. Background technique [0002] White LED (Light Emitting Diode) has many advantages such as non-toxic, long life (100,000 hours), high efficiency and energy saving, all solid state, shock resistance and good safety, and can be widely used in various lighting facilities. It is an environmentally friendly , Energy-saving green lighting source, so it is generally considered as a new light source to replace traditional lighting devices. [0003] At present, the common way to achieve white LED is to coat the blue LED chip with highly efficient phosphor powder that can be excited by blue light and emit yellow light. Mix blue light and yellow light to make the human eye produce white light vision. At present, this kind of phosphor is mainly YAG yttrium aluminum garnet, whose chemical formula is Y 3 Al 5 o 12 : Ce 3+ , th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79
Inventor 张家骅刘永福张霞郝振东
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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