Some Aspects of Electroluminescence in ZnS

Four rather disparate aspects of electroluminescence are described. Multiple primary peaks are found in the electroluminescence of a typical :Cu,Cl phosphor and are explained on the basis of field‐controlled thermal release of trapped electrons. Carrier transit times between traps and centers are shown to be negligible in ordinary electroluminescence. By means of a model of a p‐i‐n junction, carrier injection is shown to be consistent with normal delayed emission and buildup in electroluminescence. A typical electroluminescent phosphor is made photoconductive by the blue component of its own emission.