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 18 of 18 for “"Tandem Solar Cell"”.
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Assessment of the micromorph tandem solar cell
… ones has begun to be realized. The micromorph tandem solar cell shows great promise as it boasts both high efficiency and low cost. The device consists of an amorphous top cell and a microcrystalline bottom cell. Optimization through high-rate silicon deposition, light trapping, and film growth …
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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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Modeling and Design of 3-Terminal Perovskite/Silicon HBT Tandem Solar Cell
L'abstract è presente nell'allegato / the abstract is in the attachment
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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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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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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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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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Design and analysis of solar cells by coupled electrical - optical simulation
… are both crucial for achieving high-efficiency solar cells. It is common to link these two aspects serially; the optical design is first done to minimize reflection and maximize light trapping, and then the resulting optical generation rate is input to the electrical simulation. For very high …
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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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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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Integration of GaAsP alloys on Si for high-efficiency Ill-V/Si PV
… a host of electronic devices from record setting solar cells, high efficiency light emitting diodes, power amplifiers and high-mobility electron transistors. The last 60 years of research and development by the Si microelectronics industry has made the use of Si for microelectronics, power …
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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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Fabrication and characterization of AgBiS2 and BiSI light harvesting materials for thin film solar cell application
… as promising absorbing candidates for thin film solar cell application. Both compounds contain earth abundant and non-toxic elements, facilitating their low cost and large-scale production. In addition, due to the tuneable optical bandgaps by composition ratios (AgBiS2 Eg ~ 1.25-1.5 eV and BiSI …
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Tradeoffs of the use of SiGe buffer layers in tandem GaAsP/Si solar cells
III-V multi-junction solar cells currently have the highest reported theoretical and experimental energy conversion efficiency but their cost, mainly attributed to the use of expensive substrates, limits their widespread use for terrestrial applications. Successful integration of III--V's on a Si …
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Studies on monolithic tandem structure for low cost and high efficiency dye-sensitized solar cells
Multi junction solar cells are devices fabricated from two or more solar absorbers that absorb different parts of the solar spectrum. Typically this is done to yield a device with a superior efficiency to single junction devices derived from those absorbers and to surpass the efficiency limit of a …
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Dilute Nitride Quantum Engineered Solar Cells: For Next Generation of Multispectral Ultra-High Efficiency Si and III-V Photovoltaics
… manufacturing remains to be the cost of solar cell fabrication. The improvement of a cell’s photo-conversion efficiency is a critical factor in driving down the levelized cost of a solar cell. To improve the efficiency beyond the single junction limit, we must focus on the transmission …
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Generation, recombination and extraction of charges in polymer
… efficiency improvement of bulk heterojunction solar cells based on electron-donating conjugated polymers in combination with soluble fullerene derivatives has been achieved over the past years. Certified and reported power conversion efficiencies now reach over 9% for single junctions and …