ULTRAFAST CHARGE TRANSFER ACROSS MOLECULE/METAL INTERFACES BY RESONANT PHOTOEMISSION SPECTROSCOPY

The authors review recent studies of charge transfer dynamics across molecule/metal interfaces by resonant photoemission spectroscopy done at the Surface, Interface and Nanostructure Science (SINS) beamline, Singapore Light Source Synchrotron. The interfacial charge transfer takes place in the femtosecond scale due to the strong coupling between molecules and metal substrate, indicating that the transport properties of the molecule/metal junction is dominated not only by the chemical nature of molecules but also the interfacial properties of molecule/metal. Resonant photoemission spectroscopy is demonstrated to be a powerful tool for the study of ultrafast charge transfer dynamics across molecule/metal interfaces.