FUEL 267 |
| Nanocomposites of conjugated polymers and inorganic nanomaterials show great promise for photovoltaic applications. Optimization and improvement of device efficiency requires a detailed understanding of the dynamics of charge separation across the conjugated polymer-nanoparticle interface. In this paper, we examine electron transfer dynamics from polyphenylenevinylene (PPV) and polythiophene (PT) to various semiconductor nanoparticles. These particles range from wide gap metal oxides (TiO2, SnO2, In2O3), to doped nanoparticles (Sb:SnO2), and quantum dots. Charge separation dynamics were measured by transient absorption spectroscopy in the visible and infrared. We discuss how the charge separation dynamics depends on the nature of the semiconductor (conduction band edge and density of states), doping level and extent of quantum confinement. These dynamics will be compared with those at the molecule-nanoparticle interface. |
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Photovoltaic Solar Cells for Energy Applications: Nanomaterials for PV Applications
9:00 AM-12:15 PM, Thursday, August 23, 2007 Boston Park Plaza -- Cambridge Rm, Oral
Division of Fuel Chemistry |