Mechanism of electroluminescence in alkalinehyphen;earth sulfides

摘要

A novel use of a staircase voltage waveform shows that three light emission peaks can be produced with a unipolarity voltage pulse in alkalinehyphen;earthhyphen;sulfide electroluminescent devices. Two peaks following the voltage decrease demonstrate the following: Light can be produced at fields much below those required for hothyphen;electron effects. Activators are ionized when a field is applied. Recombination controls electroluminescence.