METHOD FOR PRODUCING ELECTROLUMINESCENT PHOSPHOR USING ZINC SULFIDE

摘要

A method of making zinc sulfide based electroluminescent phosphors is described wherein a first-fired zinc sulfide material having a hexagonal beta -ZnS crystal structure is at least partially converted to a distorted hexagonal beta -ZnS crystal structure by ultrasonic irradiation. The first-fired material is then fired at a lower temperature to form an electroluminescent phosphor.