Infrared Quenching of Cadmium Sulfide

Abstract

Infrared quenching of has been investigated as a function of applied voltage and both infrared and exciting light intensities. Infrared quenching of photoconductivity due to light of wave lengths shorter than that corresponding to the absorption edgeincreases as the voltage is increased. The quenching spectrum is found to shift with temperature in approximately the same amount as the corresponding shift of the absorption edge. An explanation of infrared quenching is offered based on infrared freed holes recombining with trapped electrons within the crystal.