The structure and properties of phthalocyanine films grown by the molecular-beam epitaxy technique. II. Ultraviolet/visible spectroscopic study

Ultrathin films of F-bridged Al-phthalocyanine polymer, (AlPcF)n, grown by the molecular-beam epitaxy technique show unusual spectroscopic properties which can be described by the possibility of pseudomorphic layer formation at the thin-film/substrate interface. A change in the electronic structure of the molecules of this layer is presumed to occur. The existence of the layer is directly related to the degree of epitaxy.