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 20 of 21 for “"tandem solar cells"”.
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Three terminal Si-Si:Ge monolitic tandem solar cells
Stand-alone transparent Si solar cell and low band gap Si:Ge solar cell can be applied together in a high performance multi-junction solar cell system to absorb the middle and long wavelength light. In this system, optics needs to be designed carefully for the back side of transparent Si solar cell …
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Designing metal grid contacts for four-terminal tandem solar cells
Flat-panel tandem solar cells have demonstrated the potential to exceed the efficiencies of their single-junction constituents. However, robust rules for tandem solar cell design are currently lacking, slowing the development of cost-effective implementations of this technology. The four-terminal …
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Comparative study of dilute nitride and bismide sub-junctions for tandem solar cells
Theoretical models show that tandem solar cells can reach efficiency of more than 50 %. To achieve efficiencies closer to the projected outputs in a quad tandem solar cell, a 1.0 eV sub-junction with good optical and electrical properties is sought. The observed bandgap reduction when small amounts …
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Optical and electrical optimization by advanced characterization of monolithic perovskite/silicon tandem solar cells
Hybrid metal-halide perovskite solar cells have experienced a tremendous development within a short time period. In 2009 the first perovskite single-junction solar cell with a power conversion efficiency (PCE) of 3.8% was presented. Just eleven years later, in year 2020, a PCE of 25.5% was …
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Selective area epitaxy of III-V nanowires: toward nanowire-on-silicon tandem solar cells
… a tunnel diode for use in a nanowire-on-silicon solar cell. Finally, future directions for the continued study of SAE-NWs are outlined.
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Beyond the Shockley-Queisser limit : intermediate band and tandem solar cells leveraging silicon and CdTe technology
The efficiencies of single-junction solar cells have been rapidly increasing and approaching their fundamental Shockley-Queisser efficiency limits. This is true for mature commercial technologies such as silicon and cadmium telluride. In order to enable solar cells with higher efficiency limits, …
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Interface engineering and multi-modal characterization of co-evaporated metal halide perovskite films for efficient perovskite-silicon tandem solar cells
… energy technologies. Perovskite–silicon tandem solar cells (PSTs) have recently reached certified efficiencies of 34.9%, surpassing the single-junction efficiency limit and underscoring their industrial potential. To enable large-scale deployment, up-scalable deposition methods for metal …
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Studies of sputtered CdTe and CdSe solar cells
… commercially successful polycrystalline thin filmsolar module material. Its low cost, large-area solar module is reshaping the silicondominatedsolar panel market; however, CdTe has much room to improve and thus morefundamental understanding is needed. Current thin film solar cell research is …
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Atomic layer deposition of metal oxides for photovoltaic applications
Organic-inorganic halide perovskite solar cells have gained a lot of traction in recent years due to their high power conversion efficiencies (PCE), >20%, tunable band gap and low fabrication costs. However, as the maximum theoretical efficiency outlined by the Shockley-Quiesser model for a …
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Towards High-Performance Multi-Junction Perovskite Solar Cells: Fabrication, Interlayer Design, and Characterisation
… possible to capture a broader range of the solar spectrum. This has led to the development of perovskite-on-silicon tandems, perovskite-perovskite tandems, and even triple-junction devices, some of which have already outperformed the efficiency of their individual single junction components. …
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Multisource Evaporation of Perovskite Solar Cells
… perovskites for their application in solar cells. Halide perovskite materials have shown several promising properties, such as high absorption coefficient, low exciton binding energy, high charge mobility, long diffusion length and low annealing temperature. Moreover, their tunable …
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Advancing inorganic perovskite solar cells for application in tandem architectures
Silicon-perovskite tandem solar cells have remarkable power conversion efficiencies (PCEs) and can contribute to the rapid transition towards renewable energy sources. While inorganic perovskite solar cells show superior temperature stability as compared to organic-inorganic perovskite solar cells, …
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Barium Oxide as an Intermediate Layer for Polymer Tandem Solar Cell
Polymer solar cells (PSCs), a member of organic solar cell family, have attracted increasing research interest. PSCs possess significant advantages over their inorganic solar cell counter parts: mechanical flexibility, light weight, low expense, and the potential to achieve roll-to-roll large-scale …
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Enhancing the Photovoltaic Performance of P3HT/PDIB Silsesquioxane Donor-Acceptor System Using Spray Deposition Fabrication Technique
… few years, the solution-processed organic based solar cells gained more importance by meeting the demands for cost effective photovoltaic devices. To date, the focus of the organic photovoltaic devices has been on the optimization of the processing the materials to improve photo conversion …
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Developing high efficiency Cu2ZnSnS4 (CZTS) thin film solar cells by sputtering
… is able to be combined with other photovoltaic cells with lower bandgap (like Si) for tandem solar cells, enabling higher power conversion efficiency beyond the single junction solar cell Shockley-Queisser efficiency limit. To be widely deployed in either case, the development of high efficiency …
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Characteristics of a New Copolymer For Bulk Heterojunction Solar Cells
<p>Organic solar cells have attractive aspects like flexibility, light-weight, environment-friendliness and low-cost due to manufacturing-ease on large area substrates using roll-to-roll processing, solution casting or screen printing. Most high performance organic solar cells utilize tandem …
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Materials, photophysics and device designs for high efficiency photovoltaics
… recent past, the cost of power generated using solar photovoltaics (PVs) has dropped below that of power generated by oil and gas, making them an attractive candidate in the renewable energy market. The Shockley-Queisser limit (S-Q limit), also known as the detailed balance limit, refers to the …
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Chemical Modifications and Passivation Approaches in Metal Halide Perovskite Solar Cells
… efficient charge transport layers for perovskite solar cells. We first developed an efficient electron transport layer via modification of titanium dioxide nanostructure followed by a unique chemical treatment in order to have clean interface with fast electron injection form the absorber layer in …
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Materials, methods and concepts for 21st century solar cells
… on the development of the next generation of solar panels. The motivation behind this work is explained in Chapter 1. Chapter 2 gives a background to solar panels, semiconductors and thesis relevant materials while main experimental and theoretical tools used are introduced in Chapter 3. …
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Mixed Lead-Tin Halide Perovskites for Optoelectronic Applications
… for low bandgap bottom subcell in all-perovskite tandem solar cells as well as for near-infrared light emitting diodes (LEDs), lasers and photodetectors. Although the air stability of these Sn-containing perovskites are relatively poor due to the facile oxidation of Sn2+ to Sn4+, these materials …
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