METHOD OF OBTAINING SEMICONDUCTOR COLLOID QUANTUM POINTS OF CADMIUM SULPHIDE Russian patent published in 2015 - IPC C09K11/54 C09K11/56 B82B3/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in manufacturing luminescent materials for lasers, light diodes, solar panels and biolabels. 2.5-5% solution of gelatin in distilled water is loaded into reactor at temperature 20-30°C, heated to 40-90°C; 96% ethanol in quantity 2.5% of gelatine solution volume is poured in. 0.6-5% solution of sodium sulphide and 0.8-7% solution of cadmium bromide in distilled water with temperature from 7-13°C are prepared separately. After that, double jet pouring of prepared sodium sulphide and cadmium bromide solutions into reactor with constant mixing at rate 100-600 rev/min is carried out. Volume ratio of solutions - sodium sulphide:cadmium bromide:gelatine is 1:1:4. Obtained mixture is mixed for 1-300 min, cooled to 4-10°C and exposed at said temperature for 24 hours. Formed jelly is reduced to granules with size 5-10 mm, washed by emergence for 30 min into distilled water at temperature 7-13°C. Excessive water is decanted, and granules are heated to temperature above 40°C.

EFFECT: obtained are semiconductor colloid quantum cadmium sulphide points with average size 1,5-4,2 nm and variation in size not more than ±30% in polymer matrix, possessing luminescence in interval 470-650 nm.

7 dwg, 3 ex