Abstract
The interfacial electronic structure of π-conjugated Langmuir-Blodgett (LB) films [octasubstituted palladiumphthalocyanine (PcPd) and preylene-tetra-carboxyldiimide derivative (PTCDI-Spent)] deposited on Au electrodes was examined by ultraviolet (UV) photoelectron spectroscopy (UPS), and the results were compared with these obtained by the surface potential measurement in a dark vacuum vessel. As the number of deposited layers increases, the energy shift was observed in the UPS spectra, which were found to correspond well with the surface potential change. This result indicates that excess electronic charges are transferred from LB-films to the Au electrodes until a thermodynamic equilibrium is established at the metal-film interface, resulting in the formation of an electrostatic double layer within the range of 1 to 2 nanometers in thickness. The contribution of layers sandwiched between the metal and the PcPd molecular film to the UPS spectra was also examined.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
