Microwave Photoconductivity and Luminescence of ZnS and CdS Phosphors

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Abstract
Using a microwave method for determining the true photoconductivity of ZnS and CdS powdered phosphors, and correlating these results with luminescence measurements, it is shown that the Schon-Klasens model does not hold under various conditions of excitation and additional infrared radiation. A modification of this model is proposed which takes into account the possibility that the luminescent centers have a range of differing transition probabilities. The modified model agrees with the experimental results reported here.