Searched for: subject:"Silicon"
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Shi, Shengtai (author)
This thesis study investigates the effects of differently prepared oxide substrates on gas sensing behaviors of graphene gas sensor. Explanations for why such effects happen are also revealed through experimental works. The thesis consists of a detailed study of gas sensing behaviors from graphene gas sensors using different oxide substrates....
master thesis 2017
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Kawasaki, Shinnosuke (author)
Cellular stiffness plays an important role for several diseases such as atherosclerosis, malaria and cancer. Cellular stiffness can be derived by the velocity of a cell that is squeezed through a constriction channel. For example, a rigid cell will move slowly through the constriction channel and vice versa. In this research a microfluidic...
master thesis 2017
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Li, Sihui (author)
Martensitic and bainitic steels are two types of widely used steels with excellent mechanical behaviors in automatic industry. It’s universally acknowledged that as- quenched martensite possesses poor ductility and impact toughness, which should be tempered before putting into application. During tempering, as-quenched martensite changes from a...
master thesis 2017
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de Groot, Yvar (author)
To improve the performance of the high efficiency c-Si solar cells within the PVMD group several front metallization methods were investigated. The objective was to decrease the series resistance, which would lead to an increase in FF and thus efficiency. Three different cell structure are examined; i) a poly-poly cell with SiN¬x as an ARC, ii)...
master thesis 2017
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van den Akker, Dirk (author)
This master thesis discusses the development of a hybrid manufacturing system that combines multi-material 3D-printing with silicone casting. The parties involved in this project were soft robotics research group at the University of Technology Delft and Ultimaker. Ultimaker served an advisory role and helped in providing the needed hardware....
master thesis 2017
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Stam, Machiel (author)
In the transition towards a renewable based energy supply, one of the main challenges is the intermittent nature of most renewable energy sources. In order to ensure a stable energy supply, different storage technologies attract a lot of research attention. For long term storage, using hydrogen as artificial fuel is a promising option. However,...
master thesis 2017
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de Bie, Michiel (author)
This document covers the design process of a localized heating system suitable for retrofitting to buildings in the Netherlands
master thesis 2017
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Chaudhary, Aditya (author)
A tremendous amount of research in improving the efficiency of the single junction crystalline silicon (c-Si) based solar cells has brought its efficiency (26.6%) close to the theoretical maximum achievable conversion
efficiency (29.43%) [1–3]. Thus to further improve the efficiency, new avenues of reducing losses need to be opened up. One...
master thesis 2017
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Kao, Joe (author)
PowerWindow is a luminescent solar concentrator which employs a Tm2+-doped material to strongly absorb sunlight and produce a sharp emission in the near-infrared spectrum for energy-harvesting purposes. The absence of self-absorption and the large spectral overlap with the solar spectrum make it an attractive addition to current building...
master thesis 2017
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Soto Martinez, Miguel (author)
To enable the next generation subsea boosting and processing facilities, high power electrical connectors are strongly needed and considered one of the most critical components of the system.
Electrical tree growth is a precursor to electrical breakdown in high voltage insulation materials. Therefore, the study of the tree growth dependency...
master thesis 2017
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Ge, H. (author)
To improve the conversion efficiency of c-Si solar cells, it is crucial to quench the recombination losses at c-Si/metal interface. Such recombination losses are able to be reduced by using carrier-selective passivating contacts by means of hydrogenated amorphous silicon (a-Si:H) and poly-crystalline silicon (poly-Si)/tunneling silicon oxide ...
master thesis 2017
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Zhang, Y. (author)
Crystalline silicon (c-Si) solar cells based on the polycrystalline silicon (poly-Si) passivating contact is becoming one of the most promising solar cell structures that enable high efficiency due to the minimization of metal contact recombination. The interdigitated back contact (IBC) crystalline silicon (c-Si) solar cells based on poly-Si...
master thesis 2017
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Phung, T.T.N. (author)
To reduce the usage of Indium (rare material) in CIGS, ultra thin, high efficiency CIGS based solar devices have been developed in our group. One approach is to fabricate hybrid tandem cells between hydrogenated amorphous silicon and CIGS. Because the a-Si:H top sub-cell limits the current of such a device, it is desirable to texture the top...
master thesis 2017
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Mostert, E. (author)
Electrical trains are fed with a high voltage to reduce transmission losses. In the train, these voltages have to be stepped down to a voltage that could be fed into the traction motors. This is done with IGBT based power converters. The use of IGBTs in power converters has some disadvantages: they generate a lot of heat and are therefore not...
master thesis 2017
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Hulsebos, M. (author)
With electron beam lithography, a cutting edge technology has been developed that might introduce new possibilities in the design of chips. The word "might" has been used here because e-beam lithography is not yet available for the mass production market. One of the bottlenecks in the development of e-beam lithography is the positioning...
master thesis 2017
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Harsha Achanta, S. (author)
: Light emitting diodes (LEDs) have made remarkable progress since their invention and today they can be found in a wide range of applications such as TV remotes, automotive headlamps, general lighting, traffic signals, camera flashes, display and screens. LEDs that emit light in the ultraviolet-C (UV-C) range are used in applications such as...
master thesis 2016
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van Schie, R.S. (author)
The aim of this study is to analyse the individual cells of a micromorph tandem solar cell by dark current-voltage characteristics and to study the e ffect of temperature on the individual subcells of the device, being amorphous silicon and microcrystalline silicon. Special focus is placed on studying the temperature-dependent voltage...
master thesis 2016
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Dahar, S. (author)
This thesis presents a fabrication process for medical microfluidic devices that is performed with purely silicon microfabrication methods, which is a better option for mass-production than commonly used soft lithography. The fluids passing through the channels of a microfluidic device that is fabricated using this developed method can be...
master thesis 2016
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Quik, J. (author)
Silicon nanoparticles (NPs) embedded in a dielectric matrix, such as silicon oxide, pose a promising candidate for all-silicon multi-junction solar cells. This material is often analysed with photoluminescence (PL) measurements. In literature, the intensities of different PL measurements are either directly compared or normalized. Normalization...
master thesis 2016
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Apte, A.A. (author)
The low conversion efficiency of thin-film silicon solar cells currently prevents them from competing, commercially, with the dominant crystalline silicon technology. The small thickness of the photo-active layer in thin-film silicon solar cells is an advantage for reducing raw material consumption and increasing industrial throughput, but...
master thesis 2015
Searched for: subject:"Silicon"
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