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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 14 of 14 for “"ultraviolet photoelectron spectroscopy"”.
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A STUDY OF THE ELECTRONIC PROPERTIES OF SOME HETEROCYCLIC COMPOUNDS AND THE THERMAL DECOMPOSITION OF METHYLATED THIOBUTYROLACTONES
… and furan were studied by the technique of ultraviolet photoelectron spectroscopy and from these studies, we want to predict the electrical conductivity of their corresponding polymers. From the photoelectron spectra, four bands corresponding to four ? molecular orbitals (MO) were located in …
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The Effect of Average Grain Size on Polycrystalline Diamond Films
… polycrystalline diamond was studied using ultraviolet photoelectron spectroscopy. Polycrystalline diamond films were deposited onto molybdenum substrates by electrophoresis for grain sizes ranging from 0.3 to 108 microns. The work function and electron affinity were measured using 21.2 eV …
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All inorganic colloidal quantum dot LEDs
… as Atomic Force Microscopy, photoluminescence spectroscopy, Hall Effect measurements, X-Ray Diffraction, and Ultraviolet Photoelectron Spectroscopy, used to design efficient QD-LEDs. It reviews the steps used to optimize device performance and obtain a transparent device architecture with …
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Adsorption of water and carbon monoxide on Cu₂O(111) single crystal surfaces
… Cu₂O(111) surfaces, using thermal desorption spectroscopy (TDS), ultraviolet photoelectron spectroscopy (UPS), and X-ray photoelectron spectroscopy (XPS). Water is the only desorbing species detected in TDS and the extent of dissociation is unaffected by the surface condition: ≃ 0.25 …
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Design of band-engineered photocatalysts using TiO2
… films by capacitance-voltage measurements and ultraviolet photoelectron spectroscopy, together with detailed physical characterization by a variety of other techniques, confirm this picture.
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Work Function Study of Iridium Oxide and Molybdenum Using UPS and Simultaneous Fowler-Nordheim I-V Plots with Field Emission Energy Distributions
… The flat samples were characterized using X-ray Photoelectron Spectroscopy and X-ray diffraction to determine elemental composition, chemical shift, and crystal structure. Flat coatings of iridium oxide were also scanned by Atomic Force Microscopy to examine topography. Work functions were …
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Impact of Chemical States on the Effective Work Function of Metal Gate and High-kappa Dielectric Materials on Novel Heterostructures
… that of TiN on a silicon substrate. X-ray and ultraviolet photoelectron spectroscopy are used to observe the interface electronic states at the GaN (0001) and Al2O3, HfO2 and GaON dielectric interfaces. The GaN is cleaned using aqueous HCl prior to thermal oxidation to form GaON and atomic …
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Interfacial Electronic Structure of Dipolar Vanadyl Naphthalocyanine Thin Films
… using two-photon photoemission (TPPE) and ultraviolet photoelectron spectroscopy (UPS) were undertaken in order to assess the evolution of the electronic structure and molecular organization at the interface. The adsorbate molecule vanadyl naphthalocyanine (VONc) was used whose properties …
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Electron spectroscopic characterization of corrosion reactions of active metal systems.
… systems has been studied primarily with X-ray Photoelectron Spectroscopy. First, the interaction of metallic lithium thin films with simple glass surfaces was investigated. Li was deposited on SiO₂, sodium silicate, potassium silicate, and B₂O₃ glasses in an ultra-high vacuum deposition and …
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Zirconium nitride contacts for cadmium telluride solar cells
… function of ZrN was measured to be 4.1 eV by ultraviolet photoelectron spectroscopy (UPS). Transmission electron microscopy (TEM) indicated that the ZrN grew as columnar crystals perpendicular to the surface of CdTe with a rock-salt structure and (111) texture. A 2-3 nm thick amorphous layer …
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Single-crystal metal oxides and supported metal nanoclusters as model catalyst sytems
… the gas phase or physisorbed molecular phenol. Ultraviolet photoelectron spectroscopy shows direct evidence of charge transfer from high-temperature adsorbed phenol to electronic states of TiO2(110) usually associated with the accumulation of charge at surface oxygen vacancies, providing direct …
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Energy level engineering in colloidal quantum dot solar cells
… energy levels of lead sulfide QDs, measured by ultraviolet photoelectron spectroscopy, shift by up to 0.9 eV between different chemical ligand treatments. The directions of these energy shifts match the results of density functional theory calculations and scale with the ligand dipole moment, …
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Photothermal and Photoelectric Effects in Lithium-Ion Batteries: Mechanistic Insights and Performance Enhancement
… photothermal and photoelectric effects through ultraviolet photoelectron spectroscopy (UPS) and UV-Vis spectroscopy in Li-ion batteries by using semiconducting metal oxide including anatase/rutile TiO2 and Fe2O3. Results indicated that photothermal effects dominated at the applying voltage which …
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Toward efficient and stable quantum dot solar cells : design and characterization
… between these QD layers, as confirmed by ultraviolet photoelectron spectroscopy. A device with this architecture reached a certified efficiency of 8.55 %, breaking previous record efficiencies of QD solar cells. The device stability has been significantly improved in this work by …