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Thin conducting cadmium oxide (CdO) films were ..
Epitaxial doped CdO films onsingle-crystal MgO(100) exhibit significantly higher mobilities (up to236 cm2/V·s) and carrier concentrations than that of films onglass, arguing that the epitaxial CdO films possess fewer scatteringcenters and higher doping efficiencies due to the highly texturedmicrostructure.
Exposing themesoporous SiO2-CdO and SiO2-ZnO thin film precursors to H2S and H2Se at RTenabled the synthesis of mesoporous SiO2-CdS, SiO2-CdSe, SiO2-ZnS, and SiO2-ZnSe thin films.
Investigation of chemical bath deposition of CdO thin films ..
Adding a silica precursor to the two surfactants (C12EO10-CTAB)-saltmesophase produced mesostructured salted-silica, and its calcination producedsponge-like mesoporous silica-metal oxide (dumped meso-SiO2-CdO and mesoSiO2-ZnO)thin films.
However, the mesostructured CdS/P85 films (at low saltconcentrations), which were obtained by reacting [Cd(H2O)4](NO3)2/P85 LLCthin films under H2S atmosphere, are not stable to calcination process and alwaysproduced bulk CdO and CdS domains over the thin films.
Study Of Transparent Conducting CdO Thin Films With A Tunable ..
However, formation of a meso-CdO-SiO2 thin film, on top of the meso-P25 film, was observed upon using a concentrated MASA solution in the infiltration step.
Keywords: Cadmium oxide ; Optical properties ; Platinum
Summary: The optical properties of the CdO and Pt doped CdO thin films synthesized by sol-gel technique were investigated.
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In this thesis, mesoporous transition metal oxides thin films and CdSe sensitized TiO2 photoanodes have been fabricated using MASA approach and characterized using multi-analytical techniques.
Feb 24, 2009 · Dr
Molten salt-assisted-self-assembly (MASA) method, that has simple stages such as preparation of a clear solution of the precursors in water or ethanol, coating of this solution on a substrate as a thin film, and calcination of the film at an elevated temperature is a simple and useful method to fabricate mesoporous thin films.
The Study On Structure And Properties Of ..
The thesis uses surface science techniques to characterise the chemical composition and electronic properties of a range of carbon containing materials which have application in advanced semiconductor fabrication. The initial focus was on investigating the properties ofcarbon-doped oxide (CDO) which is a low dielectric constant material and a leading candidate to replace silicon dioxide (SiOz) as an interlayer dielectric (ILD) in microprocessor fabrication. The work then progresses to determine the optimum experimental conditions required to etch thin films of this material, while retaining the chemical composition, in an industrial fluorocarbon-based plasma etching (FBPE) system. This study was preceded by an investigation of how the chemical composition of a thin fluorocarbon films which forms on a surface in the plasma etcher depends on the C4Fs/Ar/Oz gas feed ratios and the power levels used in the processing. These studies were benchmarked by undertaking baseline studies of the plasma processing of conventional Si02 inter layer dielectric material. The chemical composition of the fluorocarbon films and the CDO layers were analysed using X-ray photoelectron spectroscopy (XPS). Synchrotron radiation based x-ray absorption spectroscopy GAS) and x-ray emission spectroscopy (XES) as well as resonant soft X-ray emission spectroscopy (RSXE) have been used to provide information on the valence band and conduction band state of both the CDO layers and the fluorocarbon films. The final part of the thesis consists of the measurement of the electronic structure of thin films of the organic semiconductor tetraphenylporphyrin (TPP) and metal TPP. The carbon and nitrogen partial density of states for both the valence and conduction band electronic structure has been determined, as well as core level spectra. Good agreement was found between the experimental measurements of the valence and conduction bands, and the results of density functional theory calculations.
The thesis studies the films ' structures and ..
Highlyconductive and transparent CdO thin films have been grown on glass andon single-crystal MgO(100) by MOCVD at 400°C, and were used astransparent anodes for fabricating small-molecule organic-light emittingdiodes (OLEDs).
Raman spectrometer, UV-vis spectrometer, Thin films ..
Four series of doped CdO thin films have been grown on both amorphousglass and single-crystal MgO(100) substrates by metal-organic chemicalvapor deposition (MOCVD), and their phase structure, microstructure,electrical, and optical properties investigated.
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