Figure 4: Energy level diagrams.

L4P-sp3 without interlayer on (a) Zn-terminated ZnO(0001) and (c) O-terminated ZnO(000-1), and with [RuCp*mes]+ interlayer (b,d), respectively. Energy values are referenced to the Fermi level and in eV. The offset between the L4P-sp3 and ZnO energy levels is highlighted in red. The L4P-sp3 LUMO region is shaded with a gradient to represent uncertainties due to the unknown transport gap.