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Phosphate fluorescent powder with adjustable luminescence color as well as preparation method and application of phosphate fluorescent powder

A technology of luminescent color and blue phosphor, which is applied in the direction of luminescent materials, chemical instruments and methods, sustainable buildings, etc., can solve the problems of lack of luminescent materials and phosphors, and achieve high chemical stability, good luminescent performance, The effect of simple preparation method

Pending Publication Date: 2022-08-05
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is not only a lack of luminescent materials that can be effectively excited by near-ultraviolet light, but also a lack of phosphors that can be adjusted from green to red.

Method used

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  • Phosphate fluorescent powder with adjustable luminescence color as well as preparation method and application of phosphate fluorescent powder
  • Phosphate fluorescent powder with adjustable luminescence color as well as preparation method and application of phosphate fluorescent powder
  • Phosphate fluorescent powder with adjustable luminescence color as well as preparation method and application of phosphate fluorescent powder

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment provides a color-tunable phosphate phosphor, the chemical formula of which is Ba 3 Bi 0.97 (PO 4 ) 3 :0.03Tb 3+ , its preparation method comprises the following steps:

[0040] (1) Press Ba 3 Bi 0.97 (PO 4 ) 3 :0.03Tb 3+ The stoichiometric ratio of the corresponding elements in the 3 , Bi 2 O 3 , NH 4 H 2 PO 4 , Tb 4 O 7 , mix and grind each raw material in an agate mortar;

[0041] (2) Transfer the ground powder to an alumina crucible, pre-fire at 500°C for 4 hours, cool to room temperature, take out, fully grind, and then place the pre-fired and ground product at 1250°C for 3 hours calcination. After naturally cooling to room temperature, the calcined and cooled product is taken out and fully ground to obtain phosphor powder, and the obtained phosphor powder is stored in a drying box.

Embodiment 2

[0043] This embodiment provides a color-tunable phosphate phosphor, the chemical formula of which is Ba 3 Bi 0.93 (PO 4 ) 3 :0.07Tb 3+ , the difference between its preparation method and Example 1 is that this example is based on Ba 3 Bi 0.93 (PO 4 ) 3 :0.07Tb 3+ The stoichiometric ratio of the corresponding elements in the 3 , Bi 2 O 3 , NH 4 H 2 PO 4 , Tb 4 O 7 .

Embodiment 3

[0045] This embodiment provides a color-tunable phosphate phosphor, the chemical formula of which is Ba 3 Bi 0.89 (PO 4 ) 3 :0.11Tb 3+ , the difference between its preparation method and Example 1 is that this example is based on Ba 3 Bi 0.89 (PO 4 ) 3 :0.11Tb 3+ The stoichiometric ratio of the corresponding elements in the 3 , Bi 2 O 3 , NH 4 H 2 PO 4 , Tb 4 O 7 .

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Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to phosphate fluorescent powder with adjustable luminescent color and a preparation method and application thereof. The chemical formula of the phosphate fluorescent powder with the adjustable luminescence color is Ba3Bi1-y-x (PO4) 3: yTb < 3 + >, xEu < 3 + >, y is larger than or equal to 0, and x is larger than 0 and smaller than or equal to 0.3. The color-adjustable phosphate fluorescent powder provided by the invention can be effectively excited by near ultraviolet light, the adjustability of emitted light of the fluorescent powder in a range from green to red can be realized by regulating and controlling the doping content of Eu < 3 + > and the doping content of Tb < 3 + > in the fluorescent powder, and the moving range is large, so that the luminescence regulation and control from green light emission to red light emission are realized; the application requirements of high-color-rendering-index white light LED illumination can be met; in addition, the color-adjustable phosphate fluorescent powder provided by the invention is simple in preparation method, relatively low in synthesis temperature, free of special equipment and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to a luminescent color-tunable phosphate fluorescent powder and a preparation method and application thereof. Background technique [0002] As a new type of semiconductor lighting source, light emitting diodes (LEDs) have been widely used in indoor lighting, indicator lights and other fields due to their high photoelectric conversion efficiency, long life, and environmental friendliness. White LEDs have been extensively studied as the next-generation lighting method. [0003] Blue LED chips with XAG:Ce 3+ The method of encapsulating yellow light phosphors to realize white light emission is currently the most mature technical solution for the preparation of white light LEDs, and has been widely used as a commercial white light LED. However, this method has problems such as low color rendering index, excessive influence of current on luminous color, and unstable color te...

Claims

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Application Information

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IPC IPC(8): C09K11/74H01L33/50
CPCC09K11/7796H01L33/502Y02B20/00
Inventor 高妍宋济安温敏华孟智超崔燕
Owner WUYI UNIV
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