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 11 of 11 for “"tin dioxide"”.
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The manufacture and commercial applications of metastannic acid and of tin dioxide based semiconducting materials
… to be designed together with a proposed operating cycle as part of this work. As well as manufacturing metastannic acid Keeling and Walker Ltd. also produce a range of tin dioxide based semiconductors for industrial applications. Work was carried out in this project to try to find a suitable …
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Microstructural Evolution in Mocvd-Derived Tantalum-Doped Tin Dioxide Thin Films and Subsequent Property Changes
In this study, a series of Ta-doped SnO2 thin films was grown on glass and A12O3(0001) substrates utilizing the metal-organic chemical vapor deposition (MOCVD) technique. The main focus of this study was to understand the structure-property relationship in the Ta-Sn-O material system. …
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Metalloporphyrin-decorated semiconducting oxides for gas sensing applications
… gas sensors and a large number of modified tin oxide gas sensors with various gas sensing properties have been reported in the past few decades. This project has created new solid-state materials of metalloporphyrin-decorated metal oxides for gas sensing applications, directed at the …
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Design, Product Development and Risk Assessment of Tin (sn) ring electrodes as a substitute to Silver-Silver Chloride (AG AgCI) ring electrodes for High Definition transcranial Direct Current Stimulation (HD-tDCS)
… this research thesis is to test the viability of Tin (Sn) ring electrodes as an inexpensive alternative to sintered Silver-Silver Chloride (Ag|AgCl) ring electrodes for High Definition – transcranial Direct Current Stimulation (HD-tDCS). Throughout our initial bench top testing of tin electrodes …
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Growth of Semiconductor Thin Films by Pulsed Laser Deposition
… was used to grow thin films of zinc oxide and tin dioxide on (111) p-type silicon wafers within a versatile high vacuum laser deposition system. This pulsed laser deposition system was self-designed and self-built. Parameters such as pressure, target temperature, and distance from the target to …
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Photoanode and counter electrode modification for more efficient dye sensitized solar cells
… TiO[subscript]2 barrier layers on Fluorine-doped Tin Dioxide (FTO) surface. Two preparation methods, i.e. TiCl[subscript]4 solution treatment and thermal oxidation of sputtered Ti metal films, were employed and systematically studied in order to minimize electron-hole recombination and electron …
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Behaviour of Perovskite Solar Cells Under Reverse Bias and Interface Engineering for Efficient and Stable Solar Cells
… device performance can be improved by manipulating the migration of iodine ions via reverse-biasing, for example, at -0.4 V for 3 min in dark. Characterizations suggest that reverse bias can increase the charge recombination resistance, improve carrier transport, and enhance built-in electric …
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Behaviour of Perovskite Solar Cells Under Reverse Bias and Interface Engineering for Efficient and Stable Solar Cells
… device performance can be improved by manipulating the migration of iodine ions via reverse-biasing, for example, at -0.4 V for 3 min in dark. Characterizations suggest that reverse bias can increase the charge recombination resistance, improve carrier transport, and enhance built-in electric …
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Untersuchung der gassensitiven Eigenschaften von SnO2/NASICON-Kompositen
… additives on the gas sensing properties of tin oxide layers was investigated systematically for the first time. NASICON (NAtrium, Super Ionic CONductor, Na(1+x)Zr2SixP(3-x)O12; 0 <= x <= 3) was used as a model for solid electrolyte additives. The structure of that material is ideally …
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Polovodičové senzory plynů pro detekci organických plynů a par
V tejto bakalárskej práci sú rozobrané základné vlastnosti senzorov. Ďalej obsahuje prehľad v súčasnosti najčastejšie používaných typov senzorov plynov, ktoré sú rozdelené podľa ich fyzikálneho princípu. Jadrom práce je experimentálna časť, v ktorej je popísaný postup výroby senzorov s aktívnymi …