Preparing method and application of red light materials based on ZnO doped with Co

A technology of red light and doping source, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of difficulty in obtaining red light materials, scarcity of red light materials, harmful preparations for human body, etc., and achieve no thermal stability. Poisonous, easy-to-implement, low-cost effects

Inactive Publication Date: 2012-07-04
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there have been many studies on electroluminescent devices and the technology is quite mature, there are still many problems in the display based on red, green and blue full-color: because the transition energy corresponding to red light emission is small, red light materials must have Small energy level difference, and most of the luminescent materials currently used are wide bandgap semiconductors, it is easy to obtain blue light materials and green light materials, but it is relatively difficult to obtain red light materials, which leads to red light materials In addition, the current luminescent materials such as gallium arsenide and various organic substances may be toxic, harmful to the human body, or difficult to prepare and expensive
Co is a transition metal element. Since ZnO doped with Co is prone to ferromagnetism, it is a dilute magnetic semiconductor material with great development potential, and Co ions have similar ionic radii to Zn ions and are easy to dope. Therefore, most people focus on Co The preparation method and magnetic research of doped ZnO, but the research and application of its luminescence properties are rarely involved

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  • Preparing method and application of red light materials based on ZnO doped with Co
  • Preparing method and application of red light materials based on ZnO doped with Co
  • Preparing method and application of red light materials based on ZnO doped with Co

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing a red-light material based on Co-doped ZnO, the steps are as follows:

[0025] 1) Weigh 1.3g of zinc acetate and 0.04g of cobalt acetate, mix and dissolve in 60ml of absolute ethanol, and ultrasonically dissolve for 30 minutes;

[0026] 2) Weigh 1.6g of sodium hydroxide, dissolve it in 40ml of absolute ethanol, and ultrasonically dissolve it for 30 minutes;

[0027] 3) Pour the sodium hydroxide solution prepared in step 2 into the mixed solution of zinc acetate and cobalt acetate prepared in step 1, magnetically stir for 30 minutes, then pour the resulting mixed solution into a three-necked bottle, and put the three-necked bottle Put it into a water bath, connect the condensing tube to reflux, heat in a water bath at 90°C and magnetically stir for 2 hours, and finally centrifuge the solution;

[0028] 4) The separated precipitate was washed three times with deionized water and absolute ethanol respectively, and the precipitate was dried in a forc...

Embodiment 2

[0035] A method for preparing a red-light material based on Co-doped ZnO, the steps are as follows:

[0036] 1) Weigh 2.4g of zinc acetate and 0.028g of cobalt acetate, mix and dissolve in 110ml of absolute ethanol, and ultrasonically dissolve for 30 minutes;

[0037] 2) Weigh 2g of sodium hydroxide and dissolve it in 50ml of absolute ethanol, and ultrasonically dissolve it for 30 minutes;

[0038] 3) Pour the sodium hydroxide solution prepared in step 2 directly into the mixed solution of zinc acetate and cobalt acetate prepared in step 1 and stir it magnetically for 30 minutes, then place the resulting mixed solution in a water bath at 80° C. Stir and fully react for 2 hours, and finally centrifuge the solution;

[0039] 4) The separated precipitate was washed three times with deionized water and absolute ethanol respectively, and the precipitate was placed in a blast drying oven at 40° C. to dry to obtain a Co-doped ZnO luminescent material.

[0040] The luminescent prope...

Embodiment 3

[0043] A method for preparing a red-light material based on Co-doped ZnO, the steps and process conditions are the same as in Example 1, except that the sodium hydroxide in step 2 is changed to potassium hydroxide of the same quality.

[0044] The luminescent properties of the Co-doped ZnO red light material prepared in this example are similar to those in Example 1.

[0045] The Co-doped ZnO material is used as an inorganic functional layer, the method is basically the same as in Example 1, the difference is that polyethylene glycol is used as a dispersant, and the Co-doped ZnO nanomaterial is dispersed in a polyethylene glycol solvent Co-doped ZnO polyethylene glycol solution was formed, and then the Co-doped ZnO polyethylene glycol solution was spin-coated on the zinc gallium oxide (GZO) transparent polyethylene plastic substrate that had been ultrasonically cleaned and dried. The GZO electrode is the anode of the device with a resistance of 20Ω / □; the silver-lithium alloy ...

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Abstract

A preparing method of red light materials based on ZnO doped with Co adopts ZnO with a wurtzite structure as a substrate, adopts transition metal element Co as doped ions and is prepared with a chemical co-precipitation method which includes the following steps: (1) mixing zinc sources and doping sources with solvents to obtain a mixing precursor solution; (2) mixing co-precipitator with solvents to obtain a precursor solution of the co-precipitator; (3) mixing the two precursor solutions, stirring with magnetic force and then leading the two precursor solutions to react under the heating condition; and (4) washing and drying precipitates obtained after separation respectively through deionized water and absolute ethyl alcohol. The preparing method and the application of the red light materials based on ZnO doped with Co have the advantages that the red light materials based on ZnO doped with Co has excellent optical characteristics, chemical stability, thermal stability, environment-friendly characteristics and other characteristics; the preparing method of the red light materials based on ZnO mixed with Co is simple in process, easy to implement, low in cost and suitable for scale production; and the red light materials are small in granules, easy to disperse, good in film-forming property and capable of being used as functional layer materials of electroluminescent devices.

Description

technical field [0001] The invention relates to the technical field of inorganic red light materials, in particular to a preparation method and application of a red light material based on Co-doped ZnO. Background technique [0002] With the increasing maturity and perfection of modern optoelectronic display technology, electroluminescent devices are gradually becoming a huge application prospect and market in the field of optoelectronic devices due to their advantages of thinness, light weight, high brightness, high definition, and low voltage. Prospect of new optoelectronic devices. According to different electroluminescent materials, electroluminescent devices can be divided into organic electroluminescent, inorganic electroluminescent and organic-inorganic composite electroluminescent devices. Although there have been many studies on electroluminescent devices and the technology is quite mature, there are still many problems in the display based on red, green and blue f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/60H01L33/50
Inventor 徐建萍李美惠李岚张晓松吴燕宇罗程远李萍牛喜平
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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