Energy level alignment at the porphyrin/cobaltocene interface: From transfer doping to cobalt intercalation

- Examines the energy level alignment at the interface of zinc-tetraphenylporphyrin with CoCp2∗.
- Analyzed using a transfer-doping model involving integer charge transfer.
- Doping is limited to the first monolayer of CoCp2∗, with further adlayers remaining neutral.
- Doping changes from surface molecular doping to bulk metallic doping after annealing.