| AVS 56th International Symposium & Exhibition | |
| Nanometer-scale Science and Technology | Tuesday Sessions |
| Session NS1+PV-TuA |
| Session: | Organic Photovoltaics I |
| Presenter: | S.U. Nanayakkara, University of Pennsylvania |
| Authors: | S.U. Nanayakkara, University of Pennsylvania P. Banerjee, University of Maryland D. Conklin, University of Pennsylvania T.-H. Park, University of Michigan M.J. Therien, Duke University D.A. Bonnell, University of Pennsylvania |
| Correspondent: | Click to Email |
Photo-conductance in novel multi-chromophoric molecules with porphyrin centers has been measured. This class of molecules is fully conjugated optical absorption properties that induce hole mediated conductivity with delocalization lengths on the order of 8 nm. Conjugated linker groups that terminate with a thiolate functionality (on one or both sides of the molecule) enable facile, co-valent attachment to a gold surface. We have attached these multi-chromophoric molecules between surface-bound Au nanoparticles and have measured transport as a function of varying laser excitation wavelengths. Additionally, we have measured spatially varying, charge transport in individual molecules within a tunneling junction utilizing a laser-coupled ultra-high vacuum scanning tunneling microscope. The wavelength dependent conductance will be discussed within the context of the molecule-Au junction.