Electrophosphor brightness enhancement via plasma modification of raw materials

A number of ZnS:Cu,Cl phosphors have been prepared from starting mixtures processed in different plasmas, and their properties have been studied in relation to plasma processing conditions. Plasma processing of the starting mixture is shown to increase the photo- and electroluminescence brightness of the phosphors owing to the increase in activator content and the rise in the intensity of the green emission band relative to that of the blue band.