Abstract
The present paper reports the steady state and transient photoconductivity in amorphous Se 80Te 20 thin films before and after photocrystallization which is induced by exposing to white light for about 18 h. The results indicate that the dark conductivity ( σ d) and steady-state photoconductivity ( σ ph) increase by many orders of magnitude on crystallization. However, the relative photosensitivity ( σ ph/ σ d) decreases on crystallization. The decay of photo-current becomes slower as the extent of crystallization increases.
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