Figure 3: HIOS energy levels with and without [RuCp*mes]+ interlayer.

UPS spectra of L4P-sp3 (blue curves) and ZnO (black curves). The effect of the interlayer is demonstrated on (a) Zn-terminated and (b) O-terminated ZnO. The left panels show the work function, the right panels show the valence spectra. The corresponding HIOS structure (with/without interlayer) is indicated between the panels.