The current-voltage characteristics of amorphous Se 1-x Te x films have been measured for x of 0, 0.005, 0.05 and 0.1. The results show that the occurrence of the sublinear region depends on x and the electrode surface conditions. The space charge and transient potential measurements using a new three-electrode system confirm that the sublinear behaviour is associated with the electrode-limited carrier injection and that the transition from the sublinear to the superlinear region is the onset of double injection.
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Noda et al. (1979) studied this question.
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