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 17 of 17 for “"light management"”.
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Fabrication and light management of microscale solar cells
… energy sources. This dissertation highlights efforts that tackle such challenges from different perspectives, using lightweight microscale semiconductor membranes with unconventional form factors. We start with the fabrication of second-generation silicon solar microcells, with enhanced …
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Assembly and light management of solar microcells for concentration photovoltaics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01
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Quantum dot polymer composite materials for light management in optoelectronic devices
This dissertation will highlight a path to achieve high conversion efficiency of optoelectronic devices, including photovoltaic concentrators and LED display modules. Semiconductor nanocrystals, also known as quantum dots (QDs), serve as the pivotal luminescent materials in these devices. A quantum …
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Micro-photovoltaic materials and systems for solar energy harvesting and light management
… in the case of the tandem system as a result of light harvesting by the silicon sub-cell. For the single-junction system, we also examine the influence of luminophore optical characteristic influence power conversion efficiency. We fabricate prototypes for both the single-junction and tandem LSC …
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High quality optical and optoelectronic materials for efficient light management and solar spectrum control and conversion
… devices that effectively manipulate and manage light are of great interest in multiple fields, particularly in photovoltaics (PV) as a way to absorb and convert light into electricity. On the other hand, display technologies exploit optical materials and optoelectronics to efficiently extract …
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Ultra-thin III-V photovoltaic technology for space applications
… Ultra-thin III-V solar cells, enhanced with light management strategies, are well-suited to meet the demanding performance criteria of next-generation space PV systems, including high efficiency, reduced material usage for lower manufacturing cost and launch mass, and mechanical flexibility …
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Distribution and Soil Characteristics Associated with the Neches River Rose-Mallow (Hibiscus dasycalyx)
… to be associated with more fertile soils and slightly more canopy coverage than <em>H. laevis</em> and <em>H. moscheutos</em>. <em>H. dasycalyx</em> was also strongly associated with a soil drainage class of moderately well drained to somewhat poorly drained. Soil-site properties associated …
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Structural colour in marine organisms: From nature to applications
… colouration, arising from the interaction of light with transparent materials featuring lengths comparable to visible wavelengths, is a fascinating phenomenon responsible for the appearance of many living organisms. Over the past few decades, such mechanism has been proposed to develop …
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AeroVolt Shading: Wind-Piezo Kinetic shading facade
… buildings, particularly in heating, cooling, and lighting, innovative solutions are crucial in addressing these challenges. The proposed solution centers on dynamic shading systems that adjust autonomously to environmental factors, thanks to advancements in construction and information …
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Ultra-thin GaAs Photovoltaics for Space Applications
… losses can be mitigated by integrating light management structures with nanoscale features. A new type of ultra-thin single-junction GaAs solar cell was designed using drift-diffusion simulations with an 80 nm absorber layer thickness and optimised passivation layers. In particular, the …
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Ultra-thin photovoltaic technologies with nanophotonic textures for enhanced solar energy harvesting
… is intrinsically related to the efficiency of sunlight absorption and power generation. Maximising the absorption of sunlight in ultra-thin solar cells requires careful optimisation of the full device design, tailored to minimise i) front surface reflection by means of antireflection coatings, ii) …
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Ultrathin crystalline silicon solar cells incorporating advanced light-trapping structures
… from reduced photon absorption. A range of light management structures have been proposed in the literature to address this issue and many have been demonstrated to provide high absorption across the spectral range relevant to crystalline silicon, but their promise has yet to be realized in …
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Materials, methods and concepts for 21st century solar cells
… absorber materials. Chapters 6 and 7 shed new light on the role of re-emitted photons in solar cells. Photon recycling, especially its relationship to controllable parameters, is quantified in single junction solar cells and light emitting diodes (LEDs) in Chapter 6. Photon recycling and device …
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Electrochemical wiring of cyanobacteria to anodes using polymers towards biohybrid devices for solar-chemical production
… immobilisation geometry (layered vs mixed), light management properties, polymer morphology and polymer loading towards optimal photocurrent outputs were deconvoluted. Under the conditions tested here, the osmium-modified electrodes produced higher photocurrents vs the PEDOT-modified …
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Design and Application of Waveguide Holographic Optical Elements
… (HOE) has the properties: formation in thin, lightweight films that can be deposited on various substrates; high diffraction efficiency, high transparency, low scatter, the ability to multiplex multiple holograms in the same element, and the potential for mass production by using replication …
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Enhancing solar fuel synthesis via complementary approaches: round-the-clock operation and heat utilisation
The synthesis of fuels from sunlight offers a promising sustainable solution for chemical energy storage. However, the inefficient utilisation of the solar spectrum limits its commercial viability. Requiring high energy photons to drive the reaction, a large portion of the solar spectrum, …
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Thin-Film Polymer Nanocomposites Composed of Two-Dimensional Plasmonic Nanoparticles and Graphene
… to transform critical nanotechnologies where light management is crucial, such as refractive index based nanosensors, optical coatings, and light actuated devices. Despite the great potential, effective integration of plasmonic nanoparticles with polymers remains challenging. This dissertation …