PCT patent was granted by four Countries of Europe
Recently, our PCT patent named “White-light LED red luminescent materials and preparation methods thereof” ( PCT patent NO. PCT/CN2010/077624, European patent NO.EP2027418) was granted by Germany , France , UK and Poland.
White-light LED red luminescent materials and preparation methods thereof are provided in the invention. The luminescent materials are represented by the general formula : Ca1-y-m-e-rYyMmXx-pPpZzNn : Eue, Rf, wherein M is at least one selected from Sr, Ba, Sc, Li, Na and K; X is at least one selected from B, Al and Ga, and Al must be contained; Z is at least one selected from Si, V and Nb, and Si must be contained; R is at least one selected from Dy, Er, Tm and Lu, and Dy must be contained; 0.001≤y≤0.2, 0.001≤m≤0.2, 0.5≤x, z≤1.5, 0.001≤p≤0.1, 2≤n≤4, 0.001≤e≤0.2 and 0.001≤r≤0.1. The said luminescent materials have excellent chemical stability, high luminous efficiency and good optical decay resistance.
The invention patent has been applied in the company's products, and will have a positive impact on the company to explore domestic and foreign markets and product promotion.