A blue light excitation mn4+ doped oxyfluoride red phosphor and preparation method thereof

A technology of oxyfluoride and phosphor, which is applied in the field of oxyfluoride red phosphor and its preparation, can solve the problems of expensive phosphor and achieve high luminous efficiency

Inactive Publication Date: 2019-05-14
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of phosphor also has some disadvantages such as high price, so the development of new and efficient phosphors that can be excited by blue light has important research significance and application prospects.

Method used

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  • A blue light excitation mn4+ doped oxyfluoride red phosphor and preparation method thereof
  • A blue light excitation mn4+ doped oxyfluoride red phosphor and preparation method thereof
  • A blue light excitation mn4+ doped oxyfluoride red phosphor and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: take by weighing 0.664 g and Nb 2 o 5 Dissolve in 5ml hydrofluoric acid (40wt%), stir at room temperature for 60 minutes until completely dissolved, add 0.062g potassium hexafluoromanganate to the solution and react for 30 minutes; then add 0.608g cesium fluoride solid and continue stirring for 50 minutes. The resulting precipitate was washed 3 times with anhydrous acetic acid and anhydrous methanol, and finally dried in a vacuum oven for 24 hours. The orange-red powder obtained was the final product Cs 2 Nb 5 :Mn 4+ .

[0020] The XRD diffraction pattern of this fluorescent powder is attached figure 1 As shown, the diffraction peak of the sample is consistent with the standard card JCPDS 45-0940 (Cs 2 Nb 5 ) are completely consistent, and no diffraction peaks of any heterogeneous phases are observed, which indicates that our synthesized samples have a single crystal phase.

[0021] attached figure 2 Shown are the room temperature excitation spect...

Embodiment 2

[0023] Embodiment 2: take by weighing 0.664 g and Nb 2 o 5 Dissolve in 5 ml of hydrofluoric acid (40wt%), stir at room temperature for 40 minutes until completely dissolved, add 0.032 g of potassium hexafluoromanganate to the solution and react for 40 minutes; then add 0.208 g of rubidium fluoride solid and continue stirring for 60 min . The resulting precipitate was washed 3 times with anhydrous acetic acid and anhydrous methanol, and finally dried in a vacuum oven for 24 hours. The orange-red powder obtained was the final product Rb 2 Nb 5 :Mn 4+ .

[0024] attached Figure 4 Shown is the XRD diffraction pattern of this phosphor, which is the same as the standard card JCPDS 43-0398 (Rb 2 Nb 5 ) consistent, our synthesized samples have a single crystal phase.

[0025] attached Figure 5 Shown are the room temperature excitation spectrum (monitored at 632 nm) and emission spectrum (excited at 465 nm) of the sample. The sample has strong broadband excitation in both u...

Embodiment 3

[0027] Embodiment 3: take by weighing 0.664 g and Nb 2 o 5Dissolve in 5 ml of hydrofluoric acid (40wt%), stir at room temperature for 40 minutes until completely dissolved, add 0.032 g of potassium hexafluoromanganate to the solution and react for 40 minutes; then add 0.084 g of sodium fluoride solid and continue stirring for 60 min . The resulting precipitate was washed 3 times with anhydrous acetic acid and anhydrous methanol, and finally dried in a vacuum oven for 24 hours. The orange-red powder obtained was the final product Na 2 Nb 5 :Mn 4+ .

[0028] attached Figure 7 Shown is the XRD diffraction pattern of this phosphor, which is consistent with the standard card JCPDS 77-1423 (Na 2 Nb 5 ) consistent, our synthesized samples have a single crystal phase.

[0029] attached Figure 8 Shown are the room temperature excitation spectrum (monitored at 630 nm) and emission spectrum (excited at 460 nm) of the sample. The sample has strong broadband excitation in both ...

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Abstract

The invention relates to the field of inorganic light emitting materials and discloses a red oxyfluoride phosphor for blue light semiconductor light emitting diodes and a preparation method of the red oxyfluoride phosphor. The chemical composition of the novel Mn<4+> excited red oxyfluoride phosphor for the blue light semiconductor light emitting diodes is A2Nb(1-x)OF5:xMn<4+>; A is Cs, Rb or Na; x represents a molar percentage coefficient of correspondingly doping Mn<4+> ions to Nb<5+> ions, and x is larger than 0 and smaller than or equal to 0.10. The related red phosphor mainly emits red light at about 632 nm under the blue light excitation and has high light emitting efficiency. The blue light excited high-color-purity red oxyfluoride light emitting material is performed in a solution. The preparation method adopts a simple synthesis process and is applicable to industrial mass production.

Description

technical field [0001] The invention relates to a Mn that can be effectively excited by blue light 4+ A doped oxyfluoride red phosphor and a preparation method thereof, specifically, an oxyfluoride red phosphor applied to a blue light-emitting diode (emission wavelength is about 460 nm) and a preparation method thereof. It belongs to the field of preparation of inorganic functional materials. Background technique [0002] After entering the 21st century, energy crisis and environmental protection issues are becoming more and more serious. The new white LED lighting has attracted widespread attention due to its advantages of energy saving and environmental protection. The current commercial white LED device is mainly through the yellow phosphor YAG:Ce 3+ Absorbing blue light from the LED chip produces yellow light emission, which is combined with the chip's blue light to obtain white light. However, this commercial white LED has many disadvantages, such as high color temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67H01L33/50
CPCC09K11/671H01L33/502H01L2933/0041
Inventor 汪正良杨至雨王楠周强唐怀军罗利军郭俊明
Owner YUNNAN MINZU UNIV
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