PHOTOCONDUCTIVE DECAY CHARACTERISTICS OF THE SURFACE OF SINTERED CADMIUM-SULFIDE PELLET - A METHOD OF ANALYSIS

Surface photoconductive decay of sintered CdS pellet at room temperatu re (300 K) and above (up to 450 K) has been studied. No photoconductiv ity could be found above 450 K. A method of estimating the relaxation times and recombination barrier heights from the decay curves at vario us temperatures has been proposed. Analysis reveals the existence of t hree different recombination barriers of heights 0.05, 0.08 and 0.10 e V, which ale responsible for the slow relaxation phenomena in sintered CdS surface. Relaxation times of the non-equilibrium carriers were fo und to decrease with the rise of temperature.