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AbstractAbstract
[en] We studied the impact of photophysical and photochemical processes on the interdot Forster energy transfer in monodisperse CdSe/ZnS quantum dot solids. For this, we investigated emission spectra of CdSe/ZnS quantum dot solids in the vicinity of gold metallic nanoparticles coated with chromium oxide. The metallic nanoparticles were used to enhance the rate of the energy transfer between the quantum dots, while the chromium oxide coating led to significant increase of their photo-oxidation rates. Our results showed that irradiation of such solids with a laser beam can lead to unique spectral changes, including narrowing and blue shift. We investigate these effects in terms of inhibition of the plasmonically enhanced interdot energy transfer between quantum dots via the chromium-oxide accelerated photo-oxidation process. We demonstrate this considering energy-dependent rate of the interdot energy transfer process, plasmonic effects, and the way photo-oxidation enhances non-radiative decay rates of quantum dots with different sizes.
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Source
(c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
CADMIUM COMPOUNDS, CHALCOGENIDES, CHEMISTRY, CHROMIUM COMPOUNDS, DECAY, ELEMENTS, EMISSION, INORGANIC PHOSPHORS, LASERS, LUMINESCENCE, MATERIALS, METALS, NANOSTRUCTURES, OXIDES, OXYGEN COMPOUNDS, PARTICLE DECAY, PHOSPHORS, PHOTON EMISSION, SELENIDES, SELENIUM COMPOUNDS, SEMICONDUCTOR DEVICES, SOLID STATE LASERS, SPECTRA, SULFIDES, SULFUR COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, TRANSITION ELEMENTS, ZINC COMPOUNDS
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