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 20 of 26 for “"luminescent materials"”.
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NEW ORGANIC AND HYBRID INORGANIC/ORGANIC LUMINESCENT MATERIALS
… with selected pendants, aiming at obtaining RTP materials and suitable ligands to be employed in luminescent metal complexes and coordination polymers.
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Studies of luminescent materials including novel preparation of phosphors
… regular spherical sized particles have similar luminescent properties to those of the commercial standards available. The potential of tin oxide as a host lattice for the synthesis of phosphors has been studied. It is concluded that tin oxide cannot compete against established host lattices. A …
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High-Nuclearity Lanthanide(III) Complexes as Single-Molecule Magnets and Luminescent Materials
The employment of the bridging/chelating Schiff base ligands, N-salicylidene-o-aminophenol (saphH2), N-salicylidene-o-aminocyclohexanol (sachH2) and N-salicylidene-2-amino-5-chlorobenzoic acid (sacbH2), in lanthanide (LnIII) cluster chemistry has afforded four families of polynuclear and dinuclear …
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Synthesis, characterization and fluorescence performance of LaF3:Ce3+ nanocrystals
… are considered to be a promising new class of luminescent materials. Usually, lanthanide-doped nanocrystals production entails the use of ligands and high-temperature, which limits their biological applications and lowers their processability. This thesis proposes a simple and affordable …
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Synthesis and charaterisation of phosphorescent copper (I) complexes for light emitting devices
… have been made to improve the active materials in a new generation of organic light emitting devices (OLEDs). Current OLED technology is focused on organo-transition metal complexes, which emit from the triplet excited state and exhibit bright phosphorescence. Efficient in devices have …
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Copper(I) phenanthroline complexes and supramolecular systems containing fullerenes: Photophysics, photochemistry and potential applications in sustainable energy technologies.
… by the search for efficient photoactive materials to be employed in the context of the energy problem: materials to be utilized in energy efficient devices and in the production of renewable electricity and fuels. We presented a new class of copper complexes, that could find application …
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Silicon nanoparticle sysnthesis through thermal catalytic pyrolysis
… flexible electronics, including solar cells and luminescent materials, printed on paper. A remaining key challenge however in the development of applications is the reproducible and reliable production of nanomaterial in sufficient quantities. Historically nanoparticles have been manufactured by …
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Optical properties and biological applications of fluorescent gold nanoclusters
… exceptional characteristics compared with other luminescent materials such as good water-solubility, high photostability, large Stokes shift, ultrasmall size, nontoxicity, and good biocompatibility. Despite promising applications and intensive interests, the study of the fluorescence mechanism of …
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Investigation of the energy transfer network in upconverting nanoparticles
… nanoparticles (UCNPs) have emerged as promising luminescent materials for a wide range of applications, including bioimaging, drug delivery, and photovoltaics. The intricate network of energy transfer processes within UCNPs enables their unique ability to convert low-energy infrared (IR) …
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Semiconductor nanocrystal composite materials and devices
… nanocrystal (quantum dot, QD) embedded composite materials and possible device applications of the resulting luminescent materials. Chemically synthesized ZnS overcoated CdSe, (CdSe)ZnS, QDs are incorporated into a polymer host material. The main challenge in the preparation of QD-polymer …
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Characterization and device applications of II-VI nanocomposites
… possible device applications of the resulting luminescent materials. The crystalline structure of these quantum dots is examined using XRD. The nature of the core-shell interface is inferred by comparison of the XRD spectra with calculated spectra and in consideration of TEM images of the QDs. …
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EXPLORATION AND MECHANISTIC STUDY OF WEAKLY COORDINATING ANIONS UNDER THERMAL AND PHOTOCHEMICAL CONDITIONS FOR SELECTIVE TRANSFORMATIONS OF C-C MULTIPLE BONDS
… in transition metal-based systems for developing luminescent materials. In the second chapter, development of [(Ipr)Au(NCMe)]+ [IMP-H] catalytic system to deliver a mild condition for internal alkyne hydration reaction was developed. Studies on the roles of solvents, temperature, and substrate …
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Synthesis of Nanocrystal Quantum Dots with Enhanced Photoluminescence for Luminescent Optoelectronics
… Specific challenges to characterising their luminescent properties have been explored in detail, also applicable to other luminescent materials. Additionally, alternative applications for luminescent quantum dots have been investigated, and finally, the gap between small-scale synthesis and …
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Luminescent nanofluids based on perovskite materials and nanodiamonds
… applications, such as biomedicine. The nanomaterials used for biomedical applications have to meet several requirements to ensure their effectiveness, safety, and suitability for specific applications. These requirements include low cytotoxicity, high biocompatibility, good stability, water …
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Luminescent Lanthanide Complexes and Nanoparticles for Biological Applications
… these challenges, several classes of Ln(III) materials were developed and investigated. Carbazole-based ligands were synthesized and coordinated to Eu(III) and Tb(III) to produce visible emitting complexes designed for viscosity and temperature sensing. These complexes were isolated to perform …
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Quantum dot polymer composite materials for light management in optoelectronic devices
… as quantum dots (QDs), serve as the pivotal luminescent materials in these devices. A quantum dots encapsulation method was developed here to homogeneously disperse QDs in a transparent polymer matrix, enabling high optical quality devices and thorough investigation of light material …
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Azoto heterociklinių darinių fluorescencinių savybių valdymas poliniais pakaitais /
In this work several series of novel fluorescent organic systems, distinguished by sensitivity to effects of the surrounding media and structural changes as well as the biological activity and similarity to some DNA fragments, are being investigated. A detailed examination of the photophysical …
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Cs-Pb-Br Core-shell Perovskite Microcrystals for Stability Improvement
… to overcome these limits. Combining two or more materials at the nanoscale results in new heteronanocrystals that outperform the pure material. To improve the stability of LHP NCs against environmental stress, core-shell NCs can be created by growing a shell on the surface of core NCs, drawing …
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Method Development for Transmission Electron Microscopy of Carbon Nanotubes and for Distributed Sensing With Triboluminescent Materials in the Premise of Sustainable Infrastructure
… for distributed sensing employing fracto-luminescent materials. The developed techniques will likely allow for improvement in durability and health monitoring of cementitious composites and thus will likely contribute toward a sustainable use of cementitious material.</p> <p>The first half …
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