Polycrystallines high-efficient Phosphore and procedures for the production

文件类型：PDF文档
文件大小：159K
A phosphor is provided that has a host material that is doped with a dopant having the chemical structure XCl3, where X is a rare earth element or combination of elements. A free oxygen contributor is also added to provide the free oxygen necessary to activate the rare earth dopant. The processing of the phosphor includes the heating of the phosphor in an overpressure environment of zinc, cadmium or tellurium. The heating is done in a two-temperature zone enclosed environment, so that impurities in the phosphor powder are condensed out on the cooler surface. Alternatively, the dopant may be a material that is not a rare earth element, such as copper, tellurium, cadmium, silver, potassium, manganese, magnesium, calcium, strontium, and barium.