Observation of Enhanced Energy Transfer in Individual Quantum Dot−Oligophenylene Vinylene Nanostructures

The temporal and spectral properties of luminescence from individual CdSe quantum dot−oligophenylene vinylene nanostructures (single quantum dots with conjugated organic ligands coordinated to the surface) are profoundly modified relative to blended films of the same components. These kinds of composite quantum dot-conjugated organic systems have attracted significant interest as a way to improve efficiency in photovoltaic device applications. By direct functionalization of the dot surface with the conjugated organic ligands, we realize a significant enhancement in energy transfer and luminescence stability.