High-Frequency-Induced Electroluminescence in ZnS

A brief presentation of data is given for electroluminescent measurements made on several ZnS crystals over a frequency range of 1 cps to 370 Mc/sec. Electroluminescent relaxation becomes apparent in the order of ${10}^5$-${10}^6$ cps. A simple exponential equation, $I=A{(V-V_0)}^B$, was found to fit the time-average electroluminescent intensity vs voltage over four decades of intensity.