Cathodoluminescence of CaS:Ce[sup 3+] and CaS:Eu[sup 2+] Phosphors

Abstract

Data are presented on green‐emitting , red‐emitting , and doubly activated , including spectra, efficiency, and decay characteristics. Green rivals the best green ZnS‐type phosphors in efficiency, color, and brightness at low beam current and is appreciably better at high current. Red is better than in terms of efficiency but, because of the less favorable emission spectrum, only about equal to it in brightness.