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Wide band ultraviolet excitation green luminous material and its preparation method

A luminescent material and broadband technology, applied in luminescent materials, chemical instruments and methods, etc., can solve difficult problems and achieve the effects of simple and easy production process, low sintering temperature, uniform and fine particle size

Inactive Publication Date: 2008-01-16
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

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. The electron micrograph is shown in Figure 2, and its average particle size is 1-5um.

[0020] The XRD pattern is shown in Figure 3, and 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] The fluorescence test spectrum is shown in Figure 1, and 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 480...

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 Kl and grind and mix them in a fume hood to obtain a precursor, put the above precursor in a muffle furnace for sintering at 700°C for 2 hours, and then grind slightly 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

Relating to a field of luminescene material, the invention discloses a method of preparing a bandwidth-UV-activated green-light luminescene material with a general composition formula of ZnO:xS;yM (x is equal to or more than 10-3 and equal to or less than 10-2, y is equal to or more than 10-3 and equal to or less than 10-2). The method of preparing the luminescene material is as follows: preparing the precursor by uniformly mixing the zinc-containing matrix raw material with haloid salt after grinding process, wherein the molar ratio of zinc element in the zinc-containing matrix raw material to halogent in the haloid salt is 1:0.01 to 1:0.2. The bandwidth-UV-activated green-light luminescene material of the invention presents a strong absorption in a long-wave UV region of 300-430nm and a strong emission in a wave region of 450-600nm and is characterized by simple preparation and operation technology, cheap and available raw material which has little environmental 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 Applications(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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