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 13 of 13 for “"antireflection coating"”.
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A parallel branch-and-bound algorithm for thin-film optical systems, with application to realizing a broadband omnidirectional antireflection coating for silicon solar cells
… then used to design a broadband omnidirectional antireflection coating for silicon solar energy. The design is experimentally validated using RF sputtering, and shows performance that is competitive with existing solutions based on impractical sophisticated nano-deposition techniques, as well as …
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Accurate Characterisation of Refractive Components for Future CMB Missions
… University (MU) and Cardiff University. An antireflection coating was applied to the prototype lenses and measured to test its effectiveness. During the manufacturing process some issues were detected, including a difference in refractive index between the finished lens and the sample batch …
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High efficiency thin film silicon solar cells with novel light trapping : principle, design and processing
… its width.The back reflector parameters and the antireflection coating are systematically optimized for thin film Si solar cells through simulation and experiments. A 2 [mu]m thick cell can achieve 54% efficiency enhancement using the optimized design.For proof of concept, the TPC back reflector …
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Construction of an Optical Quarter-Wave Stack Using the ISAM (Ionic Self-Assembled Multilayers) Technique
The purpose of this thesis is to make a broadband antireflection coating configuration known as a quarter-wave stack consisting of one layer of titania and of one layer of silica nanoparticles. We utilize much that is already known about silica nanoparticle deposition. The first objective of this …
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High power superluminescent light-emitting diodes
… The turning mirror in combination with an antireflection coating applied to the back side of the chip are effective in suppressing the formation of Fabry-Perot modes in the device. This allows for high optical powers to be attained without sacrificing spectral quality. The device provides …
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Visible and Infrared Light Detection Using 2D Materials
… circuit current and open circuit voltage due to antireflection coating effects, surface doping, and surface trap passivation. A single absorber solar cell with an open circuit voltage (Voc) of 380 mV and short circuit current density (Jsc) of 10.7 mA/cm² was demonstrated, thanks to the absorber …
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Pulsed Laser Dielectric Ablation for Copper-plated Silicon Solar Cells
… to a greater extent in the removal of the SiNx antireflection coating. Longer nanosecond pulses result in less steep temperature gradients, and for 266 nm nanosecond pulses, an increased melting depth compared to picosecond pulses and hence are more appropriate for laser doping processes than …
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Creation of 3-dimensional micro-optical materials
… angles of incidence, and a tunable polymer blend antireflection coating is proposed and demonstrated to eliminate this issue. Chapter 3 discusses proximity-field nanopatterning, a variation of interference lithography where a diffractive mask generates the beams of light that create the …
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Broadband, millimeter-wave antireflection coatings for cryogenic sintered aluminum oxide optics
… dissertation attempts to address one of them: antireflection (AR) coatings for high-refractive index optics. I say ""attempts to address"" because the problem is far from solved. Rather, what follows is the first iteration of a process that can complement the growing need for high detector …
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Photonic Tweezers for Optical Manipulation of Cells and Tissues
Optical tweezers represent a powerful tool for studying forces in biological samples. In this thesis, I explored applications of optical tweezers that pushed the technique beyond its limitations. In fact I worked on extending the range of forces applicable by the tweezers and on applying optical …
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Linear Optical Thin Films Formed by Electrostatic Self-Assembly
… optics, electronics, sensing and surface coatings. The feasibility of fabricating linear optical interference filters by ESA methods is demonstrated in this thesis work. Basic single-anion/single-cation ESA films are synthesized and their optical parameters -- refractive index and average …
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Fabricación de células solares sobre silicio multicristalino y silicio purificado por la vía metalúrgica
… well as in the industry, giving passivation and antireflection coating layers. Related to the hydrogen presents at the film, it can passivate the bulk in the case of the use of mc-Si. Processes are characterised for their low temperature (< 450 ºC) and their short time (in general, less that 3 …