Indium on a copper phthalocyanine thin film: Not a reactive system
Abstract
The chemical and electronic structure of indium-on-copper phthalocyanine (CuPc) contacts is addressed. Both core levels and valence-band evolutions were inspected during the incremental formation of the indium-CuPc interface. In contrast to the previous study [V. Y. Aristov , Phys. Rev. B 72, 165318 (2005)], our results suggest that the In-CuPc system is not a reactive one. This is corroborated by the absence of reactive components in the C1s and N1s regions. A component shifted toward high binding energy in the In4d spectrum and gap states—the latter emerging between the highest-occupied molecular orbital and the Fermi level, which were regarded as an evidence of a reaction between In and CuPc—are consistently interpreted in terms of the final-state effect of finite indium nanoclusters exposed at the CuPc surface.
- Publication:
-
Physical Review B
- Pub Date:
- March 2010
- DOI:
- 10.1103/PhysRevB.81.115325
- Bibcode:
- 2010PhRvB..81k5325I
- Keywords:
-
- 79.60.Dp;
- 73.20.At;
- 71.20.Rv;
- 68.55.J-;
- Adsorbed layers and thin films;
- Surface states band structure electron density of states;
- Polymers and organic compounds;
- Morphology of films