Transient and ac electrical conductivity in evaporated thin rubidium bromide films

Abstract

The transient and ac electrical conduction in thin RbBr films has been studied at room temperature as a function of the applied voltage. The results show that the electrical conductivity is due to hopping anions in the ac conductivity and at early times (10 −5 to 10 −2 s) in the transient conductivity. At times >10 −2 s the transient conductivity is due not only to hopping anions, but to the release of trapped electrons as well, either by overcoming the barrier of the trap (Poole-Frenkel effect) alone or assisted by tunneling through the barrier.