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Long wave ultraviolet excitation white luminous material and its preparation and application

A luminescent material and ultraviolet technology, applied in the directions of luminescent materials, the use of gas discharge lamps, chemical instruments and methods, etc., can solve the problems of magnesium stability and growth temperature difference, difficulty in magnesium doping, etc. The process is easy to operate, and the raw materials are cheap and easy to obtain.

Inactive Publication Date: 2008-01-16
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The study found that: since the electronegativity and atomic radius of magnesium and zinc elements are not much different, magnesium is likely to be doped into the lattice of zinc oxide, causing defects to cause significant changes in the photoelectric properties of the zinc oxide system; however, magnesium There is a clear difference between the stability of ZnO and the growth temperature, and the doping of Mg is difficult during the preparation of ZnO

Method used

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  • Long wave ultraviolet excitation white luminous material and its preparation and application

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Effect test

Embodiment 1

[0023] Weigh 0.02mol ZnS and 0.002mol MgCl 2 (The molar ratio of zinc source and magnesium source is 1:0.1); Grind in fume hood for 30-40 minutes to obtain a precursor; put the gained precursor in a muffle furnace for sintering at 950-1050°C for 1-2 hours; grind for 5 In ~10 minutes, a long-wave ultraviolet-excited white light-emitting material is obtained, the composition of which is ZnO:xMg, x=0.1.

[0024] The XRD pattern of the obtained sample (test conditions are: voltage 40kV, current 40mA, scan speed 8° / min) shows that: the main phase of the sample is zinc oxide, that is, the obtained luminescent material is based on zinc oxide as the matrix (see Figure 1) .

[0025] The fluorescence spectrogram of gained sample (test condition is: λ ex =385nm,λ em = 495nm, slit width 5nm, voltage 480V, scanning speed 600nm / min) shows that: the luminescent material has strong absorption in the long-wave ultraviolet region of 385-395nm, and has strong emission at 450-600nm (see Figure...

Embodiment 2

[0027] Weigh 0.02mol ZnS and 0.001mol MgCl 2 (The molar ratio of zinc source and magnesium source is 1: 0.05); Grinding in the fume hood for 30-40 minutes to obtain a precursor; putting the gained precursor in a muffle furnace for sintering at 950-1050° C. for 1-2 hours; grinding for 5 In ~10 minutes, a long-wave ultraviolet-excited white light-emitting material is obtained, the composition of which is ZnO:xMg, x=0.05.

Embodiment 3

[0029] Weigh 0.02mol ZnS and 0.0002mol MgCl 2 (The molar ratio of zinc source and magnesium source is 1: 0.01); Grinding in fume hood for 30-40 minutes to obtain a precursor; putting the gained precursor in a muffle furnace for sintering at 950-1050° C. for 1-2 hours; grinding for 5 In ~10 minutes, a long-wave ultraviolet-excited white light-emitting material is obtained, the composition of which is ZnO:xMg, x=0.01.

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Abstract

The invention discloses a long-wave UV activated white-light luminescene material with a composition structure of ZnO:xMg (x is equal to or more than 0.01 and equal to or less than 0.1). The method of preparing the luminescene material of ZnO:xMg is as follows: preparing the precursor by grinding the weighed raw material of zinc source and magnesium source in a fume hood for thirty to forty minutes; sintering the precursor in the muffle furnace for one to two hours at a temperature of 950-1050 DEG C; grinding the sintered composition for five to ten minutes. The luminescene material of the invention presents a strong absorption in a long-wave UV region of 385-395nm and a strong emission in a region of 450-600nm, which can be used for white-light luminescene devices, laser diodes, flat panel displays, vacuum fluorescent displays, field emission displays and etc. The invention is characterized by simple preparation and operation technology, cheap and available raw material.

Description

technical field [0001] The invention relates to a white light luminescent material, in particular to a white light luminescent material excited by long-wave ultraviolet and its preparation and application. 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, due to the most potential of white light-emitting devices (LEDs), laser diodes (LDs), vacuum fluorescent displays (VFDs) and recent new developments The huge market demand such as field emission flat panel display (FED) has promoted people's research on III-V and II-VI semiconductor materials. [0003] Zinc oxide is an important semiconductor material. It is not easy to be oxidized in the atmosphere. It has high chemical and thermal stability. Composite, is the most promising material in the production of optical devices related to excitons, and is also one of the few oxide se...

Claims

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Application Information

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IPC IPC(8): C09K11/55H01L33/00H01L33/50
CPCY02B20/181Y02B20/00
Inventor 余锡宾杨广乾陶振卫
Owner SHANGHAI NORMAL UNIVERSITY
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