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Optics, Polymer science, Energy and fuels, Nano-materials
Fluorescence of core shell (CdSe/ZnS) quantum dots (QDs) and Au nanoparticles (NPs) composite has been studied for application in quantum dot solar concentrators (QDSC). We conclude two points from the particular QD/Au NP composite studied. One; for the particular Au NPs concentration, the relative fluorescence emission enhancement increases with decreasing QD concentration. Second; the enhancement is more pronounced for the Au nanoparticles whose surface plasmon resonance wavelength overlaps with the absorption peak of QDs. The fundamental concept that could describe the change in fluorescence emission of QDs in the presence of Au NPs is the locally enhanced electromagnetic field induced by the surface plasmon resonance in the Au NPs. This leads to change in absorption, excitation and emission rate for the QDs. The optimal concentration depends on the coupling and spacing between neighbouring QDs and Au NPs.
Chandra, S., Doran, J., Kennedy, M., McCormack, S., Chatten, A.: Fluorescence Emission Study of Cdse/ZnS Quantum Dot and Au Nanoparticles Composite for Application in Quantum Dot Solar Concentrators. 26th European Photovoltaic Solar Energy Conference and Exhibition. 6th September, 2011.