Patent ID: 6641756
Filing Date: 2003-11-04
Classification: C09K

Abstract:
A method for preparing a zinc sulfide based phosphor having effective emission at low voltages, the zinc sulfide based phosphor comprising Cu as an activator, and Al as a co-activator, the method comprising the steps of:(a) weighing ZnS, CuI, AlF3 and at least two iodide series fluxes having a high purity, and uniformly mixing the ZnS, Cul, AlF3 and the at least two iodide series fluxes with deionized water to form a paste; (b) drying the paste and sieving to form uniform particles, and firing the particles to obtain phosphors; and (c) sieving and washing the phosphors with deionized water to remove impurities and the fluxes from the phosphors.