METHOD FOR PRODUCING ZnS: Cu, Cl ELECTROLUMINESCENCE PHOSPHORESCENT SUBSTANCE

摘要

PROBLEM TO BE SOLVED: To improve the half-like of a ZnS: Cu, Cl electroluminescence phosphorescent substance. SOLUTION: The method for improving the half-life of the ZnS: Cu, Cl zinc sulfide-based electroluminescence phosphorescent substance comprises heating MgSO4-7H2O in an amount of 0.015 to 0.15 mole per mole of ZnS together with a first preliminarily heated material comprising ZnS: Cu, Cl to form a second heated material.