Дисертації з теми "High refractive thin film"
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Kang, Lee. "The application of thin film planar waveguides as a refractive index detector for microscale high performance liquid chromatography." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39813.
Повний текст джерелаPh. D.
Lax, S. E. "Refractive index profiles produced by ion implantation in insulators." Thesis, University of Sussex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377075.
Повний текст джерелаKeeling, David. "Novel thin film optical modulator/tunable retarder." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/29595.
Повний текст джерелаCommittee Chair: A. Rahman Zaghloul ; Committee Members: W. Russell Callen and Doug Yoder. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Chen, Y. "Novel polysilicon high voltage thin film transistors." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597542.
Повний текст джерелаMcDonald, Peter Hughes 1965. "High temperature superconductor thin film optical detectors." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277167.
Повний текст джерелаVedula, Ramakrishna. "Materials for High Temperature Thin Film Thermocouple Applications." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/46493.
Повний текст джерелаMaster of Science
Karadeniz, Erol. "Cylindrical high index contrast thin film dielectric optical waveguide." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаModi, Mitul B. "Fracture in stress engineered, high density, thin film interconnects." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/16336.
Повний текст джерелаRecio, Gustavo. "High speed switching in magnetic recording thin-film heads." Thesis, University of Exeter, 2008. http://hdl.handle.net/10036/41479.
Повний текст джерелаMastio, Emmanuel Antoine. "Materials engineering for high efficiency thin film electroluminescent devices." Thesis, Nottingham Trent University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302407.
Повний текст джерелаZahrir, A. "Thin film growth and characterization on high temperature superconductors." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335477.
Повний текст джерелаRavindran, Ramasamy. "Deposition and characterization of high permittivity thin-film dielectrics." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4530.
Повний текст джерелаThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 17, 2009) Includes bibliographical references.
Morales-Vidal, Marta. "High performance thin film organic lasers for sensing applications." Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/63751.
Повний текст джерелаPang, Lisa Yee San. "Thin film diamond : electronic devices for high temperature, high power and high radiation applications." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313317.
Повний текст джерелаSpencer, Alaric Graham. "High rate reactive magnetron sputtering." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/10464.
Повний текст джерелаConde, Janine. "High coupling materials for thin film bulk acoustic wave resonators /." [S.l.] : [s.n.], 2009. http://library.epfl.ch/theses/?nr=4489.
Повний текст джерелаGiraldo, Muñoz Sergio. "Advanced strategies for high efficiency kesterite thin film solar cells." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/523538.
Повний текст джерелаEl objetivo principal de esta tesis es el desarrollo de células solares de capa fina de alta eficiencia basadas en absorbedores compuestos de elementos de baja toxicidad y abundantes en la corteza terrestre (kesterita, Cu2ZnSnSe4 (CZTSe)), mediante la implementación de estrategias innovadoras de dopaje. En particular, se ha desarrollado un método secuencial basado en el depósito por sputtering de capas metálicas seguido por un proceso térmico reactivo. A través de la optimización de los procesos y la implementación y análisis de diferentes elementos dopantes, se han investigado los mecanismos de pérdida de eficiencia más relevantes en kesteritas, contribuyendo a desarrollar soluciones alternativas. Los resultados obtenidos han sido publicados como artículos en revistas internacionales de alto factor de impacto. En la primera parte de la Tesis, se han estudiado profundamente los procesos térmicos reactivos, variando los parámetros más críticos para adaptarlos a las características particulares de los precursores metálicos. Seguidamente, se ha realizado un análisis de diferentes elementos dopantes (Ag, Si, Ge, Pb e In); In y Ge se han seleccionado como los más prometedores. De estos, Ge ha mostrado excelentes propiedades como dopante, incrementando la eficiencia de los dispositivos desde 7% hasta más de 10%, mediante la introducción de capas nanométricas (10 nm aprox.) en el precursor metálico. A través de una optimización profunda del proceso de dopado con Ge, se ha obtenido una eficiencia de conversión máxima de 11.8% y un déficit de voltaje de alrededor de 0.56 V, que representa uno de los mejores valores reportados para esta tecnología. Estos progresos se han acompañado de una profunda caracterización micro-estructural, que ha facilitado la identificación de importantes características de las kesteritas, como por ejemplo la presencia de dos tipos diferentes de fronteras de grano con distinta composición. Adicionalmente, Ge induce una modificación en los mecanismos de formación de kesteritas, que ha sido clave para mejorar las propiedades de los dispositivos fotovoltaicos basados en estas tecnologías. En resumen, los resultados obtenidos en la presente Tesis han servido para comprender, implementar y demostrar soluciones innovadoras para conseguir avances significativos en el desarrollo de tecnologías fotovoltaicas sostenibles basadas en kesteritas.
Chumakov, Dmytro. "High Frequency Behaviour of Magnetic Thin Film Elements for Microelectronics." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1166388379550-04721.
Повний текст джерелаLuo, Wen. "Reliability characterization and prediction of high k dielectric thin film." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3225.
Повний текст джерелаMarchetto, Helder. "High-resolution spectro-microscopic investigations of organic thin film growth." [S.l.] : [s.n.], 2006. http://www.diss.fu-berlin.de/2006/458/index.html.
Повний текст джерелаSwift, Michael Joseph Robert. "Aspects of single crystal and thin film high field electroluminescence." Thesis, University of Hull, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304437.
Повний текст джерелаElfassy, Laurent Albert Isaac. "Josephson junctions in high temperature superconducting patterned thin film resonators." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624725.
Повний текст джерелаChumakov, Dmytro. "High Frequency Behaviour of Magnetic Thin Film Elements for Microelectronics." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A24960.
Повний текст джерелаKhattak, Yousaf Hameed. "Modeling of High Power Conversion Efficiency Thin Film Solar Cells." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/118802.
Повний текст джерела[CAT] L'energia solar fotovoltaica ha emergit com una font d'energia nova i sostenible, que és ecològica i rendible si la producció és a gran escala. En l'escenari actual, els dispositius fotovoltaics econòmics i de gran eficiència de conversió estan ben posicionats per a la generació d'electricitat neta i sostenible. Les cèl·lules solars basades en silici dominen aquest mercat des de fa molts anys. Per a la fabricació i producció de cèl·lules solars basades en silici, es requereixen tècniques de fabricació sofisticades que fan que el panell solar sigui costós. Per altra banda estan les cel·les solars de capa fina, que estan guanyant importància a causa de l'intensificació de les capacitats de fabricació. La tecnologia de capa fina és una de les tecnologies més rentables i eficients per a la fabricació de cel solars, i és un tema d'intensa investigació en la fotovoltaica industrial. La tecnologia de capa fina és més econòmica que altres tecnologies perquè els dispositius utilitzen menys material i estan basats en diversos tipus de materials semiconductors que absorbeixen la llum. Entre aquests materials, les cèl·lules solars de kesterita que utilitzen CZTS, CZTSe i les seves aleacions CZTSSe poden convertir-se en el reemplaçament òptim als absorbents de calcopirita. Aquests materials presenten unes característiques òptiques i elèctriques sobresalientes i tenen un gap òptic directe amb una banda prohibida que oscil·la entre 1,4eV i 1,5eV i un coeficient d'absorció, \alpha>{10}^4{cm}^{-1}. Aquestes característiques han propiciat que les Les kesteritas estan sent molt investigades per la comunitat fotovoltaica de capes primes. D'acord amb el límit de Shockley-Queisser, l'eficiència de conversió per a una cel·la solar basada en CZTS és d'aproximadament 28%. Aquesta eficiència és teòricament possible a través de l'ajust de la banda prohibida, però tot i així, encara no s'ha pogut assolir experimentalment, probablement a causa de la incomprensió del funcionament dels dispositius. Per a una millor comprensió de les característiques i funcionament dels dispositius, la modelització numèrica pot jugar un paper important al permetre estudiar diferents estructures de sistemes que poden estalviar temps i costos a la comunitat científica-tècnica. En aquest treball, s'ha dut a terme una modelització numèrica per estimar i analitzar l'efecte de paràmetres físics com l'espessor i la concentració de dopatge de la capa absorbent, la capa tampó i la capa finestra, a més d'estudiar l'efecte de la temperatura i l'efecte de la potència d'il·luminació del sol en el rendiment del dispositiu. L'anàlisi numèrica dels dispositius es va realitzar amb el programari de simulació denominat "Solar Cell Capacitance Simulator" (SCAPS-1D). Per això es va analitzar una estructura senzilla p-n-n^+ utilitzant molibdé com contacte posterior i FTO com a finestra òptica i contacte frontal i seguint la seqüència de materials Mo/CZTS/CdS/ZnO/FTO. A través de l'anàlisi, es va estudiar el rendiment de les cel·les solars amb la variació en l'espessor de l'absorbent per trobar l'espessor òptim de la capa absorbent. També es va estudiar l'efecte de la concentració del dopatge i de la funció de treball del metall. Després de la visualització d'una estructura de dispositiu bàsic en SCAPS-1D, es model una cel·la solar experimental basada en CZTS. Els resultats de les cel·les solars CZTS dissenyats experimentalment es simularen per primera vegada en l'entorn SCAPS-1D. Els resultats simulats de SCAPS-1D es van comparar amb els resultats experimentals. Després de l'optimització dels paràmetres de la celda, es va incrementar l'eficiència de conversió d'un dispositiu optimitzat i, a partir del modelatge, es va descobrir que el rendiment del dispositiu es millora a l'augmentar la vida útil dels minoritaris, cosa que es aconsegueix amb la incorporació d'un camp elèctric a la superfície del con
[EN] The solar cell has emerged as a newer and a relatively sustainable energy source, that is eco-friendly and cost-effective if the production is on a larger scale. In the current scenario, the economic and high-power conversion efficiency photovoltaic devices without degradation of materials are designed for the generation of electricity. The silicon-based solar cells dominated the market for many years. For the manufacturing and production of silicon-based solar cells, sophisticated fabrication techniques are required that make the solar panel costly. Due to intensification in manufacturing capabilities, thin film solar cells are gaining significance. Thin film technology is one of the most cost-effective and efficient technologies for the manufacturing of solar cells, and it is an excellent subject of intense research in the photovoltaic industry. Thin film technology is economical than other technologies because devices have relatively less material and are based on various types of light absorbing semiconductor materials. Among these materials, kesterite solar cells utilizing CZTS, CZTSe and their alloys CZTSSe are emerging as the most auspicious replacement for the chalcopyrite absorbers. The outstanding electrical and optical features having direct optical band gap ranges among 1.4eV to 1.5eV and large absorption coefficient \alpha\ >{10}^4{cm}^{-1} of CZTS have made it very interesting in the thin film community. According to the Shockley-Queisser limit, the optimum conversion efficiency of around 28\ % is theoretically possible from a CZTS based solar cell by tuning the band gap, but still, it is not experimentally possible to achieve 28% conversion efficiency from a solar cell due to lack of understanding of device characteristics. For a better understanding of device characteristics, numerical modeling can play a significant role by modeling different device structures that can save time and cost of the research community. In this work, numerical modeling was carried out for estimating and analyzing the effect of physical parameters such as thickness and doping concentration of absorber, buffer and window layers, temperature effect and effect of illumination power of the sun on device performance. Device modeling had performed on the dedicated simulation software "Solar Cell Capacitance Simulator" (SCAPS-1D). To achieve this task first, a simple {p-n-n}^+ structure for Mo/CZTS/CdS/ZnO/FTO had been analyzed with molybdenum as back contact and FTO as a front contact. Through analysis, it had been found that solar cell performance was affected by variation in absorber thickness, doping concentration, and metal work function. After visualization of a basic device structure in SCAPS-1D, CZTS based experimental solar cell had been modeled. Experimentally designed CZTS solar cell results were first simulated in SCAPS-1D environment. The SCAPS-1D simulated results were then compared with experimental results. After optimization of cell parameters, the conversion efficiency of an optimized device was increased and from modeling, it had been found that device performance was improved by improving minority carrier lifetime and integration of back surface field at the back contact. Based on the results presented, it was found that recombination in a solar cell can greatly affect the performance of a solar cell. Therefore, a new structure (Back\ contact/CFTS/ZnS/Zn(O,S)/FTO) was modeled and analyzed in which interface recombination is reduced by optimizing the band gap of Zn(O,S) layer. Based on different device structure modeling, it was found that solar cell with structure CFTS/ZnS/Zn(O,S)/FTO can exhibit an efficiency of 26.11% with optimized physical parameters like absorber thickness layer of 4\mu m and acceptor concentration density of 2\times{10}^{18}\ {cm}^{-3}. The proposed results will give a valuable guideline for the feasible fabrication and designing of high-power conversion efficiency solar cells.
Khattak, YH. (2019). Modeling of High Power Conversion Efficiency Thin Film Solar Cells [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/118802
TESIS
Lisco, Fabiana. "High rate deposition processes for thin film CdTe solar cells." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17965.
Повний текст джерелаTang, Guanghua. "High temperature thin film superconductors and microstrip spiral delay lines." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-01242009-063221/.
Повний текст джерелаBalu, Venkatasubramani. "Barium strontium titanate thin film capacitors for high-density memories /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаTeggart, Brian Joseph. "Fabrication, characterisation and magneto-optical enhancement of thin film BiGa : Dy iron garnet." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287432.
Повний текст джерелаKumar, Manish. "High density and high reliability thin film embedded capacitors on organic and silicon substrates." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26655.
Повний текст джерелаCommittee Chair: Tummala Rao; Committee Member: Pulugurtha Raj; Committee Member: Wong C P. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Webster, James R. "Thin Film Polymer Dielectrics for High-Voltage Applications under Severe Environments." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36887.
Повний текст джерелаMaster of Science
Scheunert, G. "High magnetic moment materials for thin-film applications at cryogenic temperatures." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680511.
Повний текст джерелаBashir, Aneeqa. "High-performance zinc oxide thin-film transistors for large area electronics." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/8995.
Повний текст джерелаRossi, Leonardo. "Flexible oxide thin film transistors: fabrication and photoresponse." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14542/.
Повний текст джерелаHarrison, Paul Martin. "Industrial thin film processing applications of high peak power, high average power Nd:YAG laser systems." Thesis, Heriot-Watt University, 2012. http://hdl.handle.net/10399/2613.
Повний текст джерелаAl-Rawi, S. A. N. "Silicon sublimation at ultra high vacuum with microprocessor monitoring and measurements." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382189.
Повний текст джерелаChoi, Y. J. "Very high frequency plasma enhanced chemical vapour depositions for thin film transistors." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597635.
Повний текст джерелаQian, Lingxuan, and 钱凌轩. "Amorphous InGaZnO thin-film transistor with La-based high-k gate dielectric." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206467.
Повний текст джерелаpublished_or_final_version
Electrical and Electronic Engineering
Doctoral
Doctor of Philosophy
Pohl, John E. T. "The electrical properties of bulk polycrystalline and thin film high temperature superconductors." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315041.
Повний текст джерелаSubramanian, Krishnan. "Development of next generation high voltage poly crystalline silicon thin film transistors." Thesis, De Montfort University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414914.
Повний текст джерелаHong, Shih-Ya, and 洪詩雅. "Preparation of high-refractive-index polyimide-TiO2 hybrid thin films." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/32603767221309322510.
Повний текст джерела淡江大學
化學工程與材料工程學系碩士班
100
In this study, TiO2 sols with very small particle sizes (~5 nm) were synthesized in an aprotic solvent, N,N-dimethylacetamide (DMAc) and N,N- dimethylformamide (DMF), via sol-gel reaction at room temperature. The TiO2 sol showed long-term storage stability (30 days) and can provide operating control for the preparation of high–refractive–index polyimide-TiO2 hybrid thin films. By means of spin coating and multistep baking (up to 300 oC), the hybrid thin films were prepared from the solutions composed of soluble polyimide and TiO2 sol. The FE-SEM images showed a smooth and uniform morphology of the hybrid thin films. TiO2 domains were in the nanometer range, thus avoiding the light scattering. The refractive indices at 633 nm of the prepared hybrid thin films increase from 1.63 to 2.16 with increasing TiO2 content, which suggested the potential application to anti-reflective coatings and optical waveguides.
Pan, Xuanzhao. "Mechanistic Studies of Tellurite-Based Glasses for Enhancing Visible Transparency and Ionic Conductivity." Thesis, 2022. https://hdl.handle.net/2440/136859.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 2022
Lin, Chia-Ying, and 林佳穎. "Preparation and characterization of TiO2 sol for UV-cured high-refractive-index organic-inorganic hybrid thin films." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/97544395217381997896.
Повний текст джерела淡江大學
化學工程與材料工程學系碩士班
99
In this study, UV-cured hybrid optical thin films were successfully prepared on PMMA substrates using TiO2 sols and acrylic monomers. TiO2 nanoparticles were synthesized via a sol-gel route at room temperature. Through the heat reflux process, the TiO2 nanoparticles became partial crystalline. The prepared TiO2 sols can provide operating control for the preparation of hybrid thin films by spin coating. Transparent high-refractive-index thin films were obtained with high TiO2 content. Photocatalytic ability of synthesized TiO2 nanoparticles was poor while some crystal structure existed. This may resulted from limited crystallinity of TiO2, and avoided a distinct degradation of organic moieties in the hybrids. TiO2 sols were characterized by DLS, TEM, XRD, and UV-Vis absorption, while TiO2 hybrid thin films were analyzed by UV-Vis absorption, FTIR, N&K, TGA, SEM, AFM, and contact angle. All hybrid thin films showed good adhesion to the PMMA substrate with refractive index falling over the range 1.66-1.82. These results suggested the potential application of present TiO2 hybrid films in optical devices, such as anti-reflective coatings.
(9529685), Jiaqi Li. "Conformal Coating and Shape-preserving Chemical Conversion of Bio-enabled and Synthetic 3-Dimensional Nanostructures." Thesis, 2020.
Знайти повний текст джерелаImpressive examples of the generation of hierarchically-patterned, three-dimensional (3-D) structures for the control of light can be found throughout nature. Morpho rhetenor butterflies, for example, possess scales with periodic parallel ridges, each of which consists of a stack of thin (nanoscale) layers (lamellae). The bright blue color of Morpho butterflies has been attributed to controlled scattering of the incident light by the lamellae of the wing scales. Another stunning example is the frustule (microshell) of the Coscinodiscus wailesii diatom, which is capable of focusing red light without possessing a traditional lens morphology. The photonic structures and the optical behaviors of Morpho butterflies and Coscinodiscus wailesii diatoms have been extensively studied. However, no work has been conducted to shift such light manipulation from the visible to the infrared (IR) range via shape-preserving conversion of such biogenic structures. Controlling IR radiation (i.e., heat) utilizing biogenic or biomimetic structures can be of significant utility for the development of energy-harvesting devices. In order to enhance the optical interaction in the IR range, inorganic replicas of biogenic structures comprised of high-refractive-index materials have been generated in this work. Such replicas of Morpho rhetenor scales were fabricated via a combination of sol-gel solution coating, organic pyrolysis, and gas/solid reaction methods. Diatomimetic structures have also been generated via sol-gel coating, gas/solid reaction, and then patterning of pore arrays using focused ion beam (FIB) milling.
Throughout the sol-gel solution coating and chemical conversion steps of the processes developed in this study, attention was paid to preserve the starting shapes of the nanopatterned, microscale biogenic or biomimetic structures. Factors affecting such shape preservation included the thicknesses and uniformities of coatings applied to the biogenic or biomimetic templates, nano/microstructural evolution during thermal treatment, and reaction-induced volume changes. A conformal surface sol-gel (SSG) coating process was developed in this work to generate oxide replicas of Morpho rhetenor butterfly scales with precisely-controlled coating thicknesses. The adsorption kinetics and relevant adsorption isotherm of the SSG process were investigated utilizing a quartz crystal microbalance. Analyses of thermodynamic driving forces, rate-limiting kinetic steps, and volume changes associated with various chemical reactions were used to tailor processing parameters for optimized shape preservation.Yu, Cheng-chian, and 余承謙. "Development of the Fabrication Method for Refractive Microlens Array Mold of Thin Film." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/06652409059475200232.
Повний текст джерела國立中正大學
機械工程所
94
With the progress of micro-component and micro-system technology in recent years, micro-optics has already become a hot research field. The optics can roughly be divided into a diffracting type and refracting type, the main of this text is that the new method of refracting optic-component was developed. Using spin coating, Excimar laser forming and soft replica molding fabricate a variety of the optic components. The main characteristic of this study is Excimer laser forming technology to utilize, and break through traditional person who is expose way that develop produce. Using physical method fabricate micro-curved surface. Utilize PDMS mold to form convex and concave two kinds of soft mold of shape of the microlens at the same time. It is common characteristic to be simple to make step in that make these develop with chemistry etching, it is low to mostly reach the purpose and cost for the physics way, the good stability of quality, so that can be suitable forming amount is produced.
Lin, Yao-Jun, and 林堯竣. "Determination of Thin Film Thickness and Refractive Index by Using Multiple Beam Interferometry." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/69420850297324910988.
Повний текст джерела國立成功大學
機械工程學系碩博士班
93
In this article, the main purpose is that using multiple beam interferometry to produce the Fringe of Equal Chromatic Order (FECO) and then using FECO to determine the thickness and refractive index of the thin film. There are two methods to determine the thickness and refractive index of the thin film: one is symmetrical three-layer formula from Israelachvili, the other is multilayer matrix method and fast spectral correlation interferometry. In this article, I used the two methods respectively to analysis the FECO from the simulation or from the experiment and then to determine the thickness and refractive index of the thin film. And I compared the two methods and analysis the property of FECO. Finally, I developed a completed program. Let the results in this article to aid our experiments in surface force apparatus.
Chang, Yao-Yuen, and 張耀元. "High Refractive Index and Transparent Thick Film of TiO2/Epoxy Nanocomposite." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/56313558810218593987.
Повний текст джерела國立中央大學
化學工程與材料工程研究所
97
The purpose of this research is the preparation of transparent thick film or monolith with high refractive index. Titanium oxide, with a reported refractive index of 2.5 for anatase, can be a suitable inorganic additive in improving the refractive index of organic-inorganic hybrid materials. Epoxy resin, which is in common use of LED’s encapsulation. If titanium oxide and epoxy could be composited into a transparent material, the resulting product would have wide applications. To achieve such hybrid material with high refractive index and good transparency, the particle size of titanium dioxide must be below 10 nm, for otherwise light scattering effect would dominate. For the synthesis of nano-sized titanium dioxide, tetrachloride (TiCl4) was used as a precursor, followed by hydrolysis and condensation reactions. After washed the white titanium hydroxide gel by water, peptization and crystallization took place in acidic condition. Since peptize size is strongly dependent on the solution concentration, pH and peptizing temperature, the first part of this research was finding the optimum experimental parameters to produce the smallest nano particles dispersible in water. To disperse titanium dioxide in organic solvent and resin, surface modification of the particles is pivotal. Two aliphatic amines, for instance, n-hexlamine and dodecylamine were modifying agents used in this study. After surface modification with these agents, titanium dioxide can be dispersed in chloroform. Concurrently, surface modification was done with functional silane, 3-(Trimethoxysilyl) propyl methacrylate (MPS) and 3-Glycidoxypropyl trimethoxysilane(GPS), allowing titanium dioxide to be dispersible in ethylacetate. Having successfully dissolved titanium dioxide, epoxy resin 4221 and EP828 were added. The as-synthesized TiO2/epoxy thick film is formed from MPS&GPS modified TiO2 and then dispersed in ethylacetate/epoxy 4221 mixture. From thermal gravimetric analysis (TGA), the 8 micron thick film contains up to 50 wt% inorganic material (approximately 45 wt% TiO2 estimated). In addition, the refractive index is measured to be up to 1.70, and it has over 96% transmittance at 600nm wavelength. Nonetheless, such tranparent thick film has a very low glass transition temperature (~70oC), resulting in limited applications.
Hu, Shih-Kuo, and 胡世國. "Development of Multiple Beam Interferometry Apparatus to Measure Thin Film Thickness and Refractive Index." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/76604651601997431860.
Повний текст джерела國立成功大學
機械工程學系碩博士班
94
The material will show remarkable different characteristic and phenomenon in the nano scale. It has become unlackable to build and use precise measuring technology and system to understand and control the material characteristic. The surface force apparatus not only be used in the measurement of thin film thickness and refractive index but also in the analysis of mechanics. For example: surface adsorbability ,friction.Therefore,the surface force apparatus can be used as one of the important tools to research nano science and technology. In this article,the main purpose is to build model system of surface force apparatus that applied to measure the thickness and refractive index of thin film. The main method to analyze the Fringe of Equal Chromatic Order(FECO) produced from multiple beam interferometry is by using symmetrical three-layer formula from Israelachvili. In this article, I used multilayer matrix method to simulate FECO and comparing it with the FECO from the experiment. And I researched the factors that influencing the definition of FECO. Finally, let the results in this article to aid development in the surface force apparatus.
Liang-YuanCheng and 鄭量元. "Anisotropic Thin Film Surface Plasmon Resonance on Polarization Scanning Ellipsometry for Refractive Index Measurement." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80412061246059024262.
Повний текст джерела國立成功大學
機械工程學系碩博士班
101
A surface-plasmon resonance(SPR) method based on a metal film deposited on anisotropic thin film is proposed. A polarization scanning ellipsometry is applied to achieve higher sensitivity and precision of measurement. An anisotropic thin film has been deposited in TIRE(Total Internal Reflection Ellipsometry) setup. By six anisotropic effective ellipsometric parameters based upon the amplitude ratio and phase difference of two orthogonal waves in an arbitrary coordinate system with a rotation angle θ relative to the X-Y coordinate frame, the higher sensitivity and precision of measurement can be achieved. In simulation, two different models (4-layer and 5-layer) are set to simulate solid and bio-fluidic samples. In an fixing incident angle at 72.5° of polarization scanning ellipsometry with scanning the input light’s polarization status from 0° to 180°, the resolution on 4 x 10-8 RIU can be achieved by extracting in theoritcal analysis, with refractive index varying. (1.33~1.37). And experimental confirmation in Stoke’s method has done. It has the accuracy is 2 x 10-7 which considered the instrumental error. The new method has achieved about 4 times sensitivity more than traditional spectrum-based SPR method. An polarization scanning ellipsometry only scans the linear input polarization status to excite the SPR phenomenon with an incident angle and dual-EO modulator can be applied to achieve the scanning fuction. Thus, the proposed method can reduce the risk of vibration and positioning errors from the mechanical scanning stage used in traditional ellipsometry.
Wu, Meng-Lun, and 吳孟倫. "High Performance and High Stability ZnO Thin Film Transistors." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/49694776081582444575.
Повний текст джерела國立臺灣大學
光電工程學研究所
96
This thesis focuses on two aspects of ZnO thin film transistors, the post oxygen passivation on ZnO thin film and a delta structure of ZnO TFTs. The first part demonstrates a high-performance enhancement-mode ZnO TFT on a glass substrate. A post deposition oxygen passivation technique is proposed with the purpose to fill up oxygen vacancies in the upper part of the ZnO channel layer. Before realizing the TFT device, the characteristics of ZnO thin film are examined to find out the optimal deposition conditions. The ZnO thin film is deposited by RF magnetron sputtering with the presence of O2 at low deposition rate and low temperature. The optimum duration of oxygen passivation in this work yields a device with a drain-source current level 0.87mA under a bias condition VGS=5V and VDS=15V, Ion/Ioff ratio 1.4×106. In the second part, we insert a delta doped layer into the conventional channel layer, and proposed a delta doped ZnO TFT. This structure can improve the stability and the operating current. Before realizing the TFT device, we need to find an optimal condition to growth GZO and combine the two films (ZnO and GZO) as a good channel layer. The optimum structure of a delta doped ZnO TFTs in this work yields a device with a drain-source current level 3.4mA under a bias condition VGS=5V and VDS=14V.
Wu, Meng-Lun. "High Performance and High Stability ZnO Thin Film Transistors." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2507200810423900.
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