Abstract
The effect of adsorbed oxygen on the conductivity of lead phthalocyanine films obtained by laser deposition in vacuum was studied by the method of cyclic thermodesorption. The results are explained in terms of the hopping conductivity model. It is suggested that the electron transport proceeds by hopping via both intrinsic and impurity centers differing by the radius of electron localization. It is shown that, using the method of cyclic thermodesorption in combination with the hopping conductivity model, it is possible to evaluate the electron transport parameters, such as concentration of the localization centers and the radius of electron localization in the intrinsic and impurity states, and to determine the type of centers (intrinsic versus impurity) involved in the hopping transport.
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