Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"photoluminescence lifetime"”.
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Synthesis and characterization of cerium-doped lanthanum halide colloidal nanocrystals
… absorption measurements, excitation and emission photoluminescence spectroscopy, and photoluminescence lifetime measurements.
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Next generation optoelectronic devices for energy applications utilising metal oxides, bismuth oxyhalides and lead halide perovskites
… are made. It is shown that the carrier lifetime in BiOI is fundamentally limited by the interaction with phonons at room temperature, which limits the open-circuit voltage in photovoltaics, and increase the Urbach energy. This decay channel is switched off by cooling down the single …
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Exploring excitations and vibrations in semiconductor nanocrystals through fluorescence and Raman spectroscopy
… discussion of the methods used to understand the photoluminescence and vibrational characteristics of QDs, including spectrally-resolved time-correlated single photon counting measurements to understand QD photoluminescence lifetime as a function of emission wavelength, and low-frequency Raman …
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Micro- and nanostructured materials via ultrasonic spray pyrolysis
… cells as bioimaging agents and still show bright photoluminescence after laser irradiation for several hours. Other fluorescence characteristics (e.g., photoluminescence lifetime) of these carbon dots are further studied to understand the fluorescence mechanism.
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Energetics and Dynamics in Quantum Confined Semiconductor Nanostructures
… significant absorption cross sections, and high photoluminescence quantum yields make these nanostructures promising moieties for use in optoelectronic devices, solar concentrators, chemical sensors, and biological labels. The variable dynamics of the electron-hole pairs that occur within …
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Heavy-metal-free colloidal nanocrystal heterostructures – synthetic chemistry and growth mechanisms
… the heterostructures, as well as to improve the photoluminescence quantum yield (PL QY) of nanocrystals. We first examine how different Cu precursors in the synthesis of colloidal copper sulfide (Cu2-xS) nanocrystals affect the resulting shape and phase. Decreasing aspect ratio in 1D nanorods …