Alkali metal charge compensation type aluminophosphate red luminescent material as well as preparation method and application thereof

A technology of aluminophosphate and red light emission, which is applied in the direction of light-emitting materials, chemical instruments and methods, circuits, etc., and can solve the problems of short fluorescence life, low quantum efficiency of light emission, poor thermal stability, etc.

Pending Publication Date: 2021-08-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to overcome above-mentioned prior art, Mn 4+ Doped luminescent materials have the disadvantages of low luminescence quantum efficiency, poor thermal stability,

Method used

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  • Alkali metal charge compensation type aluminophosphate red luminescent material as well as preparation method and application thereof
  • Alkali metal charge compensation type aluminophosphate red luminescent material as well as preparation method and application thereof
  • Alkali metal charge compensation type aluminophosphate red luminescent material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] According to CaAl 11.79 P 0.1 o 19.1 :0.01Mn 4+ ,0.1R + The stoichiometric ratio of Ca, Al, P, Mn, Li in (R=Li), respectively weigh calcium carbonate 0.1000g, manganese carbonate 0.0012g, lithium fluoride 0.0026g, aluminum hydroxide 0.9196g and ammonium dihydrogen phosphate 0.0115g, the raw materials were mixed and placed in an agate mortar, 2ml of absolute ethanol was added and ground, and the obtained mixture was placed in a muffle furnace for calcination under an air atmosphere at a calcination temperature of 1200°C and a calcination time of 2h. After the calcination, it was naturally cooled to room temperature, the sample was taken out and ground, and sealed for future use to obtain a Li + Ionic charge compensation type Mn 4+ Activated aluminophosphate luminescent materials.

Embodiment 2

[0049] According to CaAl 11.79 P 0.1 o 19.1 :0.01Mn 4+ ,0.1R + The stoichiometric ratio of Ca, Al, P, Mn, Na in (R=Na), weigh calcium carbonate 0.1000g, manganese carbonate 0.0012g, sodium fluoride 0.0042g, aluminum hydroxide 0.9196g and ammonium dihydrogen phosphate 0.0115g. Mix the weighed medicines in an agate mortar, add 2ml of absolute ethanol and grind them. The obtained mixture is calcined in an air atmosphere in a muffle furnace. The calcining temperature is 1200° C. and the calcining time is 2 hours. After the calcination, it is naturally cooled to room temperature and ground evenly to obtain a Na + Ionic charge compensation type Mn 4+ Activated aluminophosphate luminescent materials.

Embodiment 3

[0051] According to CaAl 11.79 P 0.1 o 19.1 :0.01Mn 4+ ,0.1R + The stoichiometric ratio of Ca, Al, P, Mn, K in (R=K), respectively weigh calcium carbonate 0.1000g, manganese carbonate 0.0012g, potassium fluoride 0.0581g, aluminum hydroxide 0.9196g and ammonium dihydrogen phosphate 0.0115g. Mix the weighed medicines in an agate mortar, add 3ml of absolute ethanol and grind, and place the obtained mixture in a muffle furnace for calcination under an air atmosphere at a calcination temperature of 1200°C and a calcination time of 2 hours. After the calcination, it is naturally cooled to room temperature and ground evenly to obtain a K + Ionic charge compensation type Mn 4+ Activated aluminophosphate luminescent materials.

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Abstract

The invention discloses an alkali metal charge compensation type Mn<4+> activated aluminophosphate luminescent material as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. The chemical composition is CaAl<11.9-x-y>P0.1O19.1: xMn < 4 + >, yR < + >, wherein R is Li, Na, K, Rb or Cs < + >, x is greater than or equal to 0.001 and less than or equal to 0.15, and y is greater than or equal to 0 and less than or equal to 1.0. According to the invention, aluminate, phosphate and calcium salt are used as raw materials, lithium salt, sodium salt, potassium salt, rubidium salt and cesium salt are used as charge compensation agents, manganese salt is used as an activating agent, and an improved high-temperature solid phase method is adopted to prepare the material. The preparation method is easy in raw material obtaining, simple in process, convenient to operate, low in cost and environmentally friendly, and the prepared sample is excellent in luminescence property, long in fluorescence lifetime, high in color purity and good in stability. The aluminophosphate luminescent material can be widely applied to lighting and display devices and plant growth light-emitting diodes, and is a promising red luminescent material.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to an alkali metal charge compensation type Mn 4+ Activated aluminophosphate red luminescent material and its preparation method and application. Background technique [0002] White light-emitting diodes (WLEDs) have been widely used in backlighting of liquid crystal displays (LCDs), solid-state lighting systems, agricultural fields, etc. Compared with traditional fluorescent lamps and incandescent lamps, WLED has many advantages, such as long service life, low cost and green environmental protection. At present, commercial WLEDs are composed of blue-emitting LED chip InGaN and yellow phosphor YAG:Ce 3+ composition. But due to the lack of red light component, this type of WLED has the characteristics of cool WLED with high color temperature (CCT>4000K) and low color rendering index (CRI<80), thus limiting their use in lighting application. To facilitate the de...

Claims

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Application Information

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IPC IPC(8): C09K11/71H01L31/032
CPCC09K11/71H01L31/032
Inventor 樊国栋张晗阮方毅
Owner SHAANXI UNIV OF SCI & TECH
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