Method for preparing semi-conductor luminescent material manganese-doped zinc sulfide nano powder

Abstract

The invention relates to a method for preparing semiconductor fluorescent material which is mixed with manganese, zinc sulphide and nanometer power. The method comprises the following steps: manganese acetate and zinc acetate are respectively weighted according to the mol ration of 1:99 or 3:97 or 5:95 to ensure that the amount of general matter of Zn<2+> and Mn<2+> is 0.01 mol; the two solid powder is mixed and dissolved with water to prepare 200 ml solution; 0.02 mol of sodium diethyldithiocarbamate powder is weighted and dissolved with water to prepare 200 mL solution; the two solutions are stirred and blended; the obtained precipitation is pumped and filtrated to obtain precursor Zn<1-x>Mn(DDTC)2, wherein, X is 0.01 or 0.03 or 0.05; 1.0 g of precursor Zn <1-x>Mn(DDTC)2 is put in a pot and placed in a muffle to be heated for 3 hours at the temperature of 300 DEG C, and then naturally cooled to the room temperature; finally Zn<1-x> MnxS of hexahedron phase is obtained. The invention solves defects such as complex operation, higher energy consumption, large kernels, many defects in crystals, plenty of water or organic solvent being polluted and wasted, long period, low productive rate, high cost and the like. The invention has the advantages of inexpensive and easy available raw materials, simple technique, low energy conservation, excellent semiconductor property and fluorescence property.

Description

technical field [0001] The invention relates to a semiconductor fluorescent material, in particular to a preparation method of a semiconductor fluorescent material doped with manganese and zinc sulfide nanometer powder. Background technique [0002] Manganese-doped zinc sulfide nanopowder with hexagonal phase, stoichiometric ratio, and narrow particle size distribution has more excellent semiconductor characteristics and fluorescence properties and has been widely used. However, the price of zinc sulfide-based luminescent raw powder is relatively high, and the supply is insufficient. Therefore, there is an urgent need for low-cost, high-quality semiconductor fluorescent materials doped with manganese and zinc sulfide nanopowders. [0003] Before the present invention, one of the commonly used methods for producing manganese-doped zinc sulfide powder was to prepare it by reacting zinc powder, manganese powder and sulfur powder at high temperature in a vacuum environment or u...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) need vacuum or inert gas protection, relatively expensive equipment, complicated operation; (2) require high reaction temperature, usually above 800 ° C, and high energy consumption; (3) the product The particles are too large, usually larger than 1 micron, and the particle size distribution is wide, requiring repeated grinding before use; (4) The stoichiometric ratio of the product is difficult to control, and there are many crystal defects, resulting in low optical quality

Although this method can obtain products with nanometer size and narrow particle size distribution, it needs to waste and pollute a large amount of water or organic solvents, the production cycle is long, the yield of products is low, the output is small, and the cost is high, so it is not suitable for industrial production.

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