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Showing 1 to 16 of 16 for “"Photoluminescence properties"”.
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BIFUNCTIONAL BF2 COMPLEXES OF POLYDENTATE BIS(AMIDINATES): SYNTHESIS, STRUCTURES, AND PHOTOLUMINESCENCE PROPERTIES
… structures are presented. The photoluminescent properties of <strong>L<sup>1-4</sup></strong>(BF<sub>2</sub>)<sub>2</sub> were investigated by their excitation, and emission spectra, as well as quantum yield determinations and the photostability tests both in solution (THF) and in the …
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Photoluminescence Properties of Lanthanide doped Wide Gap Compounds of Interest in Photonics
… Ph. D. thesis is the characterization of the photoluminescence properties of lanthanide doped wide band gap compounds of interest in photonics and optoelectronics. Wide gap compounds doped with rare earth elements are of great relevance in science and technology, with applications ranging from …
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Photoluminescence Properties of Rare Earth Niobium Containing Oxides and Flux Synthesis of Rare Earth Transition Metal Containing Oxides
… (x = 0.1-0.4) exhibit room-temperature photoluminescence with orange-red and green emissions, respectively. In addition, the excitation and emission spectra are same as the pure EuKNaNbO5 and TbKNaNbO5 compounds. For Tb0.1La0.9-xEuxKNaNbO5 (x = 0-0.1), as the energy can be transferred …
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Growth by radio frequency sputtering and characterisation of rare earth doped wide bandgap oxides
… structural, chemical, optical and near-infra-red photoluminescence properties of wide band gap oxide films. The aim of the work was to develop materials with good photoluminescence properties, which can be applied to increase the photovoltaic conversion efficiency of crystalline Si-based solar …
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A Comparative Study of Indium Arsenide/gallium Arsenide Short-Period Superlattice and Alloy Quantum Well Structures on Gallium Arsenide Substrates
… on GaAs substrates has been made. Structural properties, photoluminescence properties, and thermal stability were investigated. A 1.265-$\mu$n photoluminescence peak wavelength was observed from a 36-A ((InAs)$\sb1$/(GaAs)$\sb1$SPS) /GaAs quantum-well structure at room temperature.
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Bismuth-, Tin-, and Lead-Containing Metal-Organic Materials: Synthesis, Structure, Photoluminescence, Second Harmonic Generation, and Ferroelectric Properties
… periodicities that can exhibit a variety of properties resulting from the presence of the metal moieties and/or ligand connectors in the structure. To date, MOMs with a range of functional attributes have been prepared, including record-breaking porosity, catalytic properties, molecular …
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Controlling the Morphology and Optical Properties of Nanostructured Materials: From Inorganic Nanoparticles to Conjugated Polymers
… such as nanoparticles and polymers show properties that are highly dependent on the nanoscale morphology as well as compositions. Thus, the ability to control their nanoscale morphology is important for both fundamental understanding and technological applications of nanomaterials. My …
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Aggregation of Squaraine Dye Derivatives in Solid State Spin-coated Thin Films
… intensive studies due their unusual electronic properties that make them good candidates for a wide range of applications in various technological fields. They are particularly promising in nonlinear optics, bioimaging for labeling and sensing of biomolecules, as sensitizers for solar energy …
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Design and Characterisation of Hybrid Organic-Inorganic Materials for Luminescence Downshifting Devices
… inorganic and organic components show improved properties such as mechanical and thermal stability, processability, tunability, transparency and flexibility. Herein, two classes of hybrid organic-inorganic materials are investigated for their use in luminescence downshifting devices: a system …
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Optical Spectroscopy Analysis of the Physicochemical Properties of Poly(3-Hexylthiophene) (P3Ht) Solutions Using Various Solvents Towards Controllable Formation of Polymeric Aggregates.
… and optical techniques (e.g. absorption and photoluminescence) have seen significant success in probing these different types of aggregates as well as their behaviors. Models describing H-, J- or HJ- types play an important role in characterizing and understanding polymer's morphological and …
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Auger-mediated processes and photoluminescence in group iv semiconductor nanostructures
… Ge, and SiGe however, have shown relatively high photoluminescence (PL) quantum efficiency (QE) at low carrier concentrations. At higher carrier concentrations, the PL QE of these nanostructures is drastically reduced due to the onset of a fast non-radiative process attributed to Auger …
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Cyclometallated platinum and iridium complexes with thiolate ligands, and novel bioimaging agents inspired by dynamic disulfide interchange reactions
The photoluminescence properties of cyclometallated second and third row transition metal complexes make them potential candidates for use in a range of applications such as triplet harvesting agents in OLEDS, as photosensitizers, and in solar cells. Also, the strong luminescence of these complexes …
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Host-Guest Systems and Their Derivatives Based on Metal-Organic Frameworks
… as well as robust materials with tuneable photoluminescence properties due to geometric/quantum confinement. More recently, metal-organic frameworks (MOFs), which are hybrid hosts assembled with metal centres and organic ligands, start to be considered for creating host-guest composites. …
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Group IV element-based luminescent nanoparticles: synthesis, environmental impact evaluation and bio-imaging applications
… Due to their tunable optical and electrical properties via the quantum confinement effect, traditional QDs have stimulated a significant amount of fundamental research into nanoscale luminescence phenomena as well as the rapid growth of consumer products that are made of QDs. However, the …
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[Ru-POM] Photo-electrocatalysis
… intensive investigation as the excellent photoluminescence properties and stability of Ruthenium polypyridyl complexes in multiple redox states can be coupled to the POM in order to extend the absorbance crosssection of the resulting complex into the visible region. In this thesis, …
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Quantum dot - molecularly imprinted polymer nanomaterials for the fluorescence sensing of selected pharmaceutical and personal care products
… emission and broad absorption as well as high photoluminescence quantum yields, and they have thus attracted considerable research attention for environmental monitoring and sensing applications. Core/shell CdSe/ZnS QDs were synthesized through the one-pot organometallic approach in order to …