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Mn<4+>-doped alkali metal fluoro-phosphate red luminescent material and preparation method thereof

A technology of fluorophosphate and red luminescence, which is applied in the direction of luminescent materials, chemical instruments and methods, and can solve the problems of limited application prospects, expensive production raw materials, and harsh synthesis conditions

Active Publication Date: 2020-04-24
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these nitrogen oxides doped with rare earth ions have expensive raw materials and harsh synthesis conditions, which also limit their application prospects.

Method used

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  • Mn&lt;4+&gt;-doped alkali metal fluoro-phosphate red luminescent material and preparation method thereof
  • Mn&lt;4+&gt;-doped alkali metal fluoro-phosphate red luminescent material and preparation method thereof
  • Mn&lt;4+&gt;-doped alkali metal fluoro-phosphate red luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 11.14 g of cesium fluoride and add to 10 ml (40 %) hydrofluoric acid (HF) and 2.2 ml of hexafluorophosphoric acid to react for 30 minutes. Then, 0.15 g of potassium hexafluoromanganate was added to the solution to continue the reaction for 60 minutes. The obtained solid precipitate was washed 5 times with acetic acid, and then the solid precipitate was dried in a vacuum oven for 24 hours, and finally the obtained pink powder was the final product CsPF 6 :Mn 4+ .

[0022] attached figure 1 Shown is the XRD diffraction pattern of this luminescent material, which is consistent with the standard card JCPDS 34-0506 (CsPF 6 ) are basically consistent, which indicates that the structure of our synthesized sample is similar to that of CsPF 6 unanimous.

[0023] attached figure 2 Shown are the room temperature excitation spectrum (monitored at 633 nm) and emission spectrum (excited at 455 nm) of the sample. The sample has strong broadband excitation in the blue lig...

Embodiment 2

[0027]Weigh 7.82 g of rubidium fluoride and add to 10 ml (40%) hydrofluoric acid (HF) and 2.2 ml hexafluorophosphoric acid to react for 60 minutes. Then, 0.15 g of potassium hexafluoromanganate was added to the solution to continue the reaction for 60 minutes. The obtained solid precipitate was washed 4 times with acetic acid, and then the solid precipitate was dried in a vacuum oven for 24 hours, and finally the obtained pink powder was the final product RbPF 6 :Mn 4+ .

[0028] attached Figure 5 Shown is the XRD diffraction pattern of this luminescent material, which is consistent with the standard card JCPDS 32-0936 (RbPF 6 ) are basically consistent, which shows that the structure of our synthesized sample is consistent with that of RbPF 6 unanimous.

[0029] attached Figure 6 Shown is sample RbPF 6 :Mn 4+ The room temperature excitation spectrum (monitoring wavelength is 632 nm) and emission spectrum (excitation wavelength is 452 nm). The sample has strong broa...

Embodiment 3

[0032] Weigh 7.82 g of potassium fluoride and add to 10 ml (40%) hydrofluoric acid (HF) and 2.2 ml of hexafluorophosphoric acid to react for 60 minutes. Then, 0.15 g of potassium hexafluoromanganate was added to the solution to continue the reaction for 120 minutes. The obtained solid precipitate was washed 5 times with acetic acid, and then the solid precipitate was dried in a vacuum oven for 24 hours, and finally the obtained pink powder was the final product KPF 6 :Mn 4+ .

[0033] attached Figure 8 Shown is the XRD diffraction pattern of this luminescent material, which is consistent with the standard card JCPDS 52-1826 (KPF 6 ) are basically consistent, which shows that the structure of our synthesized sample is consistent with that of KPF 6 unanimous.

[0034] attached Figure 9 Shown are the room temperature excitation spectrum (monitored at 630 nm) and emission spectrum (excited at 464 nm) of the sample. The sample has strong broadband excitation in the blue li...

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Abstract

The invention relates to the field of inorganic functional materials, and discloses a Mn<4+>-doped alkali metal fluoro-phosphate red luminescent material and a preparation method thereof. The chemicalcomposition of the Mn<4+> doped alkali metal fluoro-phosphate red luminescent material is AP1-xF6:xMn<4+>, wherein x is the molar percentage coefficient of correspondingly doped Mn<4+> ions relativeto P<5+> ions, and x is greater than 0 and less than or equal to 0.10; and A is Cs, Rb or K. The provided red luminescent material is mainly used for emitting red light of about 633 nm under the excitation of blue light, and the light emitting efficiency is high. The preparation method of the Mn<4+>-doped alkali metal fluoro-phosphate red luminescent material is an ion exchange method, the synthesis process is simple, and the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The present invention relates to a kind of Mn 4+ A doped alkali metal fluorophosphate red luminescent material and a preparation method thereof, specifically, an alkali metal fluorophosphate red luminescent material that can be applied to gallium nitride-based blue light emitting diodes and a preparation method thereof. It belongs to the field of preparation of inorganic functional materials. Background technique [0002] White light semiconductor solid-state lighting has been widely used in people's daily life due to its advantages of energy saving, environmental protection, and long service life. The traditional semiconductor lighting source is through the commercial yellow phosphor Y 3 al 5 o 12 : Ce 3+ It is combined with a semiconductor chip that emits blue light. Due to the yellow phosphor Y 3 al 5 o 12 : Ce 3+ The red light emission component is low, leading to the biggest disadvantage of this lighting source is the low color temperatu...

Claims

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Application Information

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IPC IPC(8): C09K11/72
CPCC09K11/72
Inventor 汪正良李虹杨兆峰陈宇周强唐怀军王凯明郭俊明
Owner YUNNAN MINZU UNIV
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