Figure 2: Core and valence electron spectra for [RuCp*mes]+ on ZnO. | Nature Communications

Figure 2: Core and valence electron spectra for [RuCp*mes]+ on ZnO.

From: Efficient light emission from inorganic and organic semiconductor hybrid structures by energy-level tuning

Figure 2

Photoemission spectra for [RuCp*mes]2 deposited on O- (top panels) and Zn-terminated (bottom panels) ZnO. The left side panels show the C 1s and Ru 3d core level regions. The two different Ru 3d5/2 peaks (top left panel) correspond to neutral [RuCp*mes]2 dimer with Ru in (+2) oxidation state (RuII) and to the cationic [RuCp*mes]+ with formal Ru oxidation state (+2) but lower electron density in the valence levels (RuII+δ+). The secondary electron cutoff (providing the work function Φ) and valence spectra are shown in the right side panels. Black curves: bare ZnO. Green curves: after deposition of [RuCp*mes]+ (nominal mass-thickness given in Å).

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