Abstract
The current-voltage characteristics and photovoltage of Pd-p(n)-CdTe structures and changes in them produced by pulsed hydrogen treatment have been investigated. The current transport in Pd-n-CdTe structures [I∼exp(αV)] is found to be linked with double injection of carriers occurring as a result of their capture at trapping centers that are uniformly distributed over energy. The semiconductor regime of double injection with I∼V 2 is important for Pd-p-CdTe structures. A series of deep trapping centers, including those in the interval 0.75–0.83 eV, is responsible for the extended relaxation of the photovoltage and dark current after a hydrogen pulse (H2).
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