Electronic properties of a perylene bisimide interfaced with gold or aluminum: The influence of the substrate

- XPS/UPS was used to examine interface energetics of PBI-4-t-BuPh/metal interfaces.
- No reaction between the substrates and the organic semiconductor was observed.
- An interfacial dipole of 0.5 eV was found at the PBI-4-t-BuPh/Au interface.
- Vacuum level alignment is observed at the interface with Al.
- Al is a more suitable substrate for OFET applications using PBI-4-t-BuPh.