ZnS : Mn 螢光層のエレクトロルミネセンス

概要

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This investigation was made on PL and EL of ZnS : Mn phosphors. ZnS : Mn powder phosphors were prepared by firing of ZnS and MnCl_2. A PL emission of ZnS : Mn powder phosphors peaking at both 4500 A and 5800 A was observed by UV excitation. The EL cells in this study had an Al-ZnS : Mn-insulator layer-In_2O_3 : Sn structure. EL emission peaking at both 4500 A and 5700 A was observed under the operation of ac voltage more than 60-70 volts. The EL brightness followed the well-known log B∝V^<-1/2> equation and also increased lineally with increasing the frequency. The highest PL and EL brightness was obtained for ZnS : Mn under the condition of 0.55wt% Mn concentration.