Photoinduced degradation in the electrical properties of normally and obliquely deposited As2Se3 thin films

Dark conductivity in As2Se3 films was measured in the temperature range 300-400 K. It was found to be of the doubly activated type in high- and low-temperature ranges. The experimental results were analysed using the Meyer-Neldel rule. The effect of light soaking on the electrical transport properties of normally and obliquely deposited As2Se3 thin films were examined. It has been observed that light soaking results in the degradation of photocurrent, which nearly saturates in an hour. Dark conductivity is fqund to be smaller after light soaking than without it.