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Various coverages of perylene thin films on Au(111) were investigated using scanning tunneling microscopy (STM) and ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. A Schottky junction formed between Au(111) and perylene consisted of a large 0.65 eV interface dipole and a hole barrier height of 0.85 eV. A wetting layer of approximately 4 Å thickness was initially formed followed by island formation, consistent with Stranski–Krastanov growth. Room temperature STM investigations of nominal one monolayer perylene films revealed symmetry equivalent domains and two different stable commensurate lattice structures. Perylene film growth mode, film structure and the energy level diagram are discussed.

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Various coverages of perylene thin films on Ag(111) and Cu(111) were investigated using ultraviolet and X-ray photoelectron spectroscopy (UPS and XPS) and near monolayer (ML) films by scanning tunneling microscopy (STM). A Schottky junction is formed between perylene/Ag(111) and perylene/Cu(111) with hole barrier heights of 1.30 and 1.10 eV, respectively. When combined with previous measurements of the perylene/Au(111) interface, the slope S, in the plot of the hole barrier height as a function of work function, was calculated to be 0.53, which is higher than the S value for the other planar polyaromatic hydrocarbons without heteroatoms, revealing that the slope is material specific. During deposition a wetting layer of approximately 4 Å thickness was initially formed followed by island formation, consistent with Stranski-Krastanov (SK) growth. Room temperature STM investigations of nominal one ML perylene films revealed coincidence-II and double row array structures with commensurate lattices on Ag(111) and Cu(111), respectively. The perylene film growth mode, thin film structure, energy level diagram, and hole barrier height as a function of metal work function are discussed.