Wide band ultraviolet excitation green luminous material and its preparation method

A luminescent material, green technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as difficulties, and achieve the effects of simple and easy production process, stable chemical and optical properties, and cheap and easily available raw materials

Inactive Publication Date: 2009-11-11
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen, sulfur, and halogen have large differences in electronegativity and atomic radius, so it is difficult to incorporate them into the ZnO matrix. There are very few reports on the doping of these two elements in ZnO in domestic and foreign literature.

Method used

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  • Wide band ultraviolet excitation green luminous material and its preparation method
  • Wide band ultraviolet excitation green luminous material and its preparation method
  • Wide band ultraviolet excitation green luminous material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.02mol ZnS and 0.002mol KCl and grind and mix them in a fume hood to obtain a precursor, put the above precursor in a muffle furnace for sintering at 800°C for 1 hour, and then grind a little to obtain a broadband ultraviolet-excited green luminescent material. The composition determined by energy dispersive X-ray spectroscopy is: ZnO:xS:yCl, x=0.003, y=0.007. Electron microscope picture as figure 2 As shown, its average particle size is 1-5um.

[0020] XRD picture as shown image 3 As shown, the results show that the main phase of the sample is ZnO, that is, the luminescent material is based on ZnO. Test conditions: voltage 40kV, current 40mA, scanning speed 8° / min.

[0021] Fluorescence test pattern such as figure 1 As shown, the results show that the luminescent material has a strong absorption in the long-wave ultraviolet region of 300-430nm, and a strong emission in the 450-600nm. Test condition: λ ex =380nm,λ em =496nm, slit width 5nm, voltage 480V,...

Embodiment 2

[0023] Weigh 0.02mol ZnS and 0.001mol KBr and grind and mix them in a fume hood to obtain the precursor, put the above precursor in a muffle furnace for sintering at 800°C for 1 hour, and then grind slightly to obtain a green luminescent material excited by broadband ultraviolet light. The composition determined by energy dispersive X-ray spectroscopy is: ZnO:xS:yBr, x=0.002, y=0.002. The average particle size is 1-5um.

Embodiment 3

[0025] Weigh 0.02mol ZnS and 0.002mol KI and grind and mix them in a fume hood to obtain a precursor. Put the above precursors in a muffle furnace for sintering at 700°C for 2 hours, and then grind a little to obtain a green luminescent material excited by broadband ultraviolet rays. The composition determined by energy dispersive X-ray spectroscopy is: ZnO:xS:yl, x=0.007, y=0.005. The average particle size is 1-5um.

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Abstract

The invention relates to the field of luminescent materials, and discloses a broadband ultraviolet excited green luminescent material and a preparation method thereof. The composition of this broadband ultraviolet excited green luminescent material is: ZnO:xS:yM, wherein M is a halogen element, 10-3≤x≤10-2, 10-3≤y≤10-2. The preparation method is as follows: fully grind and mix the zinc-containing matrix raw material and the halogen salt to obtain a precursor, sinter the precursor at 700-800°C for 1-2 hours and then grind; In terms of group elements, the molar ratio of zinc element to halogen group element is 1:0.01-1:0.2. The green luminescent material excited by broadband ultraviolet of the present invention has strong absorption in the long-wave ultraviolet region of 300-430nm and strong emission in 450-600nm. The preparation method has the advantages of simple operation, low raw material price and little pollution, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a broadband ultraviolet excited green luminescent material and a preparation method thereof. Background technique [0002] In recent years, with the wide application of various functional materials, the research on the luminescent properties of materials has been deepened. At the same time, green light-emitting devices (LEDs), laser diodes (LDs), vacuum fluorescent displays (VFDs) and recent developments are the most promising. The huge market demand for potential field emission flat panel displays (FEDs) has promoted the research on III-V and II-VI semiconductor materials. [0003] ZnO is an important semiconductor material, which is not easily oxidized in the atmosphere, has high chemical and thermal stability, and has a large exciton binding energy (the exciton binding energy is 60meV, which is 3 times that of ZnSe and GaN-based materials). The band width is about 3.36eV,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/61C09K11/54
Inventor 余锡宾陶振卫杨广乾
Owner SHANGHAI NORMAL UNIVERSITY
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