Effects of Annealing on the Properties of Molecular Thin Film Heterostructures


  • The authors gratefully acknowledge the Marie Curie Training Site “Carbon Containing Thin Films” for funding of the collaboration with T. U. Chemnitz, and wish to thank Axel Fechner for technical assistance. S. H. thanks the department of Chemistry, Imperial College, for provision of a teaching assistantship, and G. S. acknowledges the EU funded Human Potential Research Training Network DIODE (Contract No.: HPRN-CT-1999-00164) for financial support.


The effects of post-growth annealing on the structure, morphology, and spectroscopic properties of molecular double-layer heterostructures containing perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) and metal-free phthalocyanine (H2Pc) have been investigated. The templated structure adopted by H2Pc on PTCDA protects the underlying PTCDA layer from sublimation, unless the H2Pc thickness is < 20 nm (see Figure).