Ya.I.Vertsimakha and A.B.Verbitsky
Effect of donor gas (ethanol vapor or ammonia) presence in air on the short-circuit photocurrent (Isc) has been investigated for barrier sandwich structures based on organic semiconductor- lead phthalocyanine. Value of Isc change due to donor gas adsorption depends strongly both on the donor gas molecular structure and on semiconductor polymorphic modification type. In the presence of donor gas, Isc increase is observed in two frequency regions and two additional maxima are appeared on the frequency dependence of Isc ratio. Intensity of these marima rises increases with the donor gas concentration and is explained by donor type complex creation. A mechanism of the donor gas air mixture interaction with semiconductor film is proposed.