Devices

Browse all posts in the Devices category.

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06MAY 2023
Devices
Unlocking the Potential of Multijunction Solar Cells: Insights from FAU Solar Members
Solar energy stands as one of the most promising solutions to address the world’s growing energy needs while reducing our carbon footprint. A pivotal aspect of harnessing solar power efficiently lies in the development of solar cells, and among them, multijunction solar cells have emerged as a beacon of hope, offering theoretical conversion efficiencies exceeding […]
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05MAY 2023
Devices
Quantifying Charge Extraction and Recombination Using the Rise and Decay of the Transient Photovoltage of Perovskite Solar Cells
Krückemeier, L., Liu, Z., Kirchartz, T. and Rau, U. Adv. Mater. 2023, 35, 2300872 The extraction of photogenerated charge carriers and the generation of a photovoltage belong to the fundamental functionalities of any solar cell. These processes happen not instantaneously but rather come with finite time constants, e.g., a time constant related to the rise […]
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28MAR 2023
Devices
Air Processing of Thick and Semitransparent Laminated Polymer: Non-Fullerene Acceptor Blends Introduces Asymmetric Current-Voltage Characteristics
Rodríguez-Martínez, X., Hartnagel, P., Riera-Galindo, S., Beket, G., Österberg, T., Gao, F., Kirchartz, T., Inganäs, O. Adv. Funct. Mater. 2023, 33, 2301192 Non-fullerene acceptors have recently revolutionized indoor organic photovoltaics (OPVs) with power conversion efficiencies exceeding 30% in laboratory scale. Nevertheless, transferring their superior performance to larger-scale prototyping, i.e., air-processing via roll-to-roll compatible techniques, still […]Rodríguez-Martínez, X., Hartnagel, P., Riera-Galindo, S., Beket, G., Österberg, T., Gao, F., Kirchartz, T., Inganäs, O. Adv. Funct. Mater. 2023, 33, 2301192 Non-fullerene acceptors have recently revolutionized indoor organic photovoltaics (OPVs) with power conversion efficiencies exceeding 30% in laboratory scale. Nevertheless, transferring their superior performance to larger-scale prototyping, i.e., air-processing via roll-to-roll compatible techniques, still […]
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09MAR 2023
Devices
Relevance of Long Diffusion Lengths for Efficient Halide Perovskite Solar Cells
Akel, S.; Kulkarni, A.; Rau, U.; Kirchartz, T. PRX Energy 2023, 2, 013004 Diffusion lengths are abundantly mentioned as a key enabler of high performance in lead-halide perovskite solar cells based on the implicit assumption that diffusion lengths are directly connected to efficient collection of charge carriers. While long diffusion lengths are indeed an important […]
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02MAR 2023
Devices
Comparing Methods of Characterizing Energetic Disorder in Organic Solar Cells
Hartnagel, P., Ravishankar, S., Klingebiel, B., Thimm, O., Kirchartz, T. Adv. Energy Mater. 2023, 13, 2300329 The energetic disorder has been known for decades to limit the performance of structurally disordered semiconductors such as amorphous silicon and organic semiconductors. However, in the past years, high-performance organic solar cells have emerged showing a continuously reduced amount […]Hartnagel, P., Ravishankar, S., Klingebiel, B., Thimm, O., Kirchartz, T. Adv. Energy Mater. 2023, 13, 2300329 The energetic disorder has been known for decades to limit the performance of structurally disordered semiconductors such as amorphous silicon and organic semiconductors. However, in the past years, high-performance organic solar cells have emerged showing a continuously reduced amount […]
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25JAN 2023
Devices
Understanding the Thickness and Light-Intensity Dependent Performance of Green-Solvent Processed Organic Solar Cells
Lübke, D.; Hartnagel, P.; Hülsbeck, M.; Kirchartz, T. ACS Materials Au 2023, 3, 215 For indoor light harvesting, the adjustable band gap of molecular semiconductors is a significant advantage relative to many inorganic photovoltaic technologies. However, several challenges have to be overcome that include processability in nonhalogenated solvents, sufficiently high thicknesses (>250 nm) and high […]Lübke, D.; Hartnagel, P.; Hülsbeck, M.; Kirchartz, T. ACS Materials Au 2023, 3, 215 For indoor light harvesting, the adjustable band gap of molecular semiconductors is a significant advantage relative to many inorganic photovoltaic technologies. However, several challenges have to be overcome that include processability in nonhalogenated solvents, sufficiently high thicknesses (>250 nm) and high […]
Read more about Understanding the Thickness and Light-Intensity Dependent Performance of Green-Solvent Processed Organic Solar Cells