Adjustable photochromic phosphor powder, phosphor thin film, preparation method and application thereof

A phosphor and light color technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of cadmium doping difficulties, cadmium ion radius, stability and growth temperature differences, etc., and achieve chemical and optical properties. Stable, high luminous efficiency, cheap and easy-to-obtain raw materials

Inactive Publication Date: 2012-07-11
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious differences between the ionic radius, stability and growth temperature of cadmium, and the doping of cadmium is very difficult in the preparation process of ZnO.

Method used

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  • Adjustable photochromic phosphor powder, phosphor thin film, preparation method and application thereof
  • Adjustable photochromic phosphor powder, phosphor thin film, preparation method and application thereof
  • Adjustable photochromic phosphor powder, phosphor thin film, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Add 0.001mol CdCl 2 Grinding with 0.02mol ZnS at room temperature for 15-30 minutes to obtain the precursor;

[0039] 2) Put the above precursor into a 50ml crucible, seal it with a lid; put it into a muffle furnace and sinter at 700°C for 3 hours;

[0040] 3) After cooling, take out the sintered material and grind it for 5 to 10 minutes, wash it with deionized water and alcohol, and dry it to get the light color tunable phosphor. The general formula of its composition is ZnCd as determined by energy dispersive X-ray spectroscopy. 0.05 o 1.05 :S y , where y=0.0001~0.01. Its particle size ranges from 100nm to 2um, as shown in the SEM image Figure 4 shown.

[0041] 4) Take 0.5 g of the tunable phosphor powder obtained above, mix it with 200 ml of 0.15 g / L sodium benzenesulfonate aqueous solution, perform ultrasonic dispersion, and stir in a water bath at 65°C for 60 minutes to obtain the precursor;

[0042] 5) Add 6 g of MMA monomer and 0.05 g of potassium persu...

Embodiment 2

[0047] The difference between this embodiment and embodiment 1 is: ZnS and CdCl 2 The mol ratio is 1: 0.01, and all the other contents are described in Example 1, thereby obtaining the target product, its composition general formula is ZnCd measured by energy dispersive X-ray spectrum 0.01 o 1.01 :S y , where y=0.0001~0.01. The XRD analysis results and the fluorescence spectrum analysis results of the obtained sample are the same as those described in Example 1.

Embodiment 3

[0049] The difference between this embodiment and embodiment 1 is: ZnS and CdCl 2 The mol ratio is 1: 0.03, and all the other contents are described in Example 1, thereby obtaining the target product, its composition general formula is ZnCd measured by energy dispersive X-ray spectrum 0.03 o 1.03 :S y , where y=0.0001~0.01. The XRD analysis results and the fluorescence spectrum analysis results of the obtained sample are the same as those described in Example 1.

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Abstract

The invention discloses an adjustable photochromic phosphor powder, a phosphor thin film, and the preparing method and the application thereof. The composition general formula of the phosphor powder is ZnCd<x>O< (1+x)>: S<y>, wherein, x and y are mole number, x is equal to 0.01-1, and y is equal to 0.001-0.01. The phosphor can be excited by broadband ultraviolet or blue / violet laser. In the preparing method, 1) a cadmium source and a zinc source are grinded to obtain a precursor, wherein, the molar ratio of zinc element in the zinc source to cadmium element in the cadmium source is 1 to (0.01-1); 2) the precursor is sintered for 1-4 hours under 650-850 DEG C. Methyl methacrylate polymer is used as a matrix and the adjustable photochromic phosphor powder is used as a luminophor to obtain the adjustable photochromic phosphor thin film. The phosphor powder and the phosphor thin film have the characteristics of high luminescence color purity and stable chemical and light-heat properties, can be applied to the manufacturing of LEDs light-emitting devices and realize the controllable adjustment of the excitation and the emission wavelength of LED-luminescent materials.

Description

technical field [0001] The invention relates to the field of luminescent materials, and specifically discloses a fluorescent material that can be excited by broadband ultraviolet or blue-violet light and has adjustable light color and a preparation method. Background technique [0002] In recent years, white LEDs lighting is experiencing a revolution sweeping the world. As the third-generation light source, semiconductor LED lighting has luminous efficiency 10 times that of incandescent lamps and life span 100 times that of incandescent lamps. With its irreplaceable advantages such as energy saving, high reliability, and mercury-free, it has penetrated into our lives and will become the mainstream of lighting in a short period of time. [0003] At present, the implementation scheme of white LEDs is mainly the combination of blue or blue-violet chips and yellow phosphors. The parameters and emission spectrum of typical products are as follows: current 20mA, voltage 3.0-3.5V,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/56C08J5/18C08L33/10C08K3/30C08F2/44C08F120/14H01L33/00
Inventor 余锡宾杨广乾王维瑛杨绪勇
Owner SHANGHAI NORMAL UNIVERSITY
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