RELATIONSHIP BETWEEN THE STRUCTURE AND THE ELECTRICAL-PROPERTIES OF LUTETIUM BISPHTHALOCYANINE THIN-FILMS

The present publication is devoted to the study of the relationship be tween the structure of thin films evaporated under vacuum and their el ectrical conductivity. Structural studies have been carried out by X-r ay and electron diffraction. The structural and microstructural featur es of condensed phases depend mainly on the film thickness and on the temperature of the substrate during the growth process. Two types of a rrangements have been characterized for films thinner than 500 angstro m. A quasi-amorphous state is observed when the substrate is maintaine d at room temperature. A polycrystalline state (alpha-phase), with pre ferred orientations, is prepared on a heated substrate in the temperat ure range 150-200-degrees-C. The conductivity increases in this last c ase by a factor of 10(2).