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The photoconductivity of 0·1 μm films of lead telluride has been investigated using 100 ns light pulses. Films protected from oxygen exposure were insensitive to light; exposed films showed considerable photoconductivity, with a decay time of 3 × 10 −6 s at 77 K. The results were quantitatively consistent with a lowering of intergranular potential barriers which exist in oxygen-exposed films.
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Green et al. (1973) studied this question.
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