Electronic properties and dynamics Organic Complexes Self Assembled Monolayers

Self Assembled Monolayers of organic-conjugated transition metal complexes (SAM) on surfaces is a focus of both device engineering and basic science, since it is a key factor in nearly all important aspects of device performances, including operation voltages, degradation, and efficiency. The huge amount of literature results related to the first monolayer and reorganization and self assembling processes is due to the general accepted result that structural and chemical properties of the first monolayer are the key parameter for controlled thin film growth. Optical and magneto-electronic properties are intimately connected and the accurate determination of electronic levels, excitation and relaxation dynamics are mandatory for the optimization of electronic, photovoltaic and optoelectronic devices. Quite a number of electronic states is generated by the interaction of light with complex organic molecules. Time resolved spectroscopies are a new investigation tool that gives the possibility of correctly addressing their origin and life time.Examples of prototypical systems are presented and discussed. Wereview on complementary techniques trying to single out how different approaches are fundamental to fully characterize these complex systems