Search Results - "Ardalan, Armin"

Accurate characterization of next-generation thin-film photodetectors by Fang, Yanjun, Armin, Ardalan, Meredith, Paul, Huang, Jinsong

“…The performance of photodetectors fabricated from emerging semiconductors such as perovskites, quantum dots, two-dimensional materials or organics, for…”
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A universal Urbach rule for disordered organic semiconductors by Kaiser, Christina, Sandberg, Oskar J., Zarrabi, Nasim, Li, Wei, Meredith, Paul, Armin, Ardalan

“…In crystalline semiconductors, absorption onset sharpness is characterized by temperature-dependent Urbach energies. These energies quantify the static,…”
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Nonfullerene Acceptors: A Renaissance in Organic Photovoltaics? by Meredith, Paul, Li, Wei, Armin, Ardalan

“…Efficient, low‐cost, and low‐embodied energy photovoltaics are key enablers of the global decarbonization agenda. In addition to the market‐leading crystalline…”
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Scaling of next generation solution processed organic and perovskite solar cells by Meredith, Paul, Armin, Ardalan

“…Why, despite considerable R&D efforts and significant translational investment over the past 20 years, has the technology of solution-processed thin film solar…”
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Direct observation of trap-assisted recombination in organic photovoltaic devices by Zeiske, Stefan, Sandberg, Oskar J., Zarrabi, Nasim, Li, Wei, Meredith, Paul, Armin, Ardalan

“…Trap-assisted recombination caused by localised sub-gap states is one of the most important first-order loss mechanism limiting the power-conversion efficiency…”
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Precision ultrasound sensing on a chip by Basiri-Esfahani, Sahar, Armin, Ardalan, Forstner, Stefan, Bowen, Warwick P.

“…Ultrasound sensors have wide applications across science and technology. However, improved sensitivity is required for both miniaturisation and increased…”
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Intrinsic Detectivity Limits of Organic Near‐Infrared Photodetectors by Gielen, Sam, Kaiser, Christina, Verstraeten, Frederik, Kublitski, Jonas, Benduhn, Johannes, Spoltore, Donato, Verstappen, Pieter, Maes, Wouter, Meredith, Paul, Armin, Ardalan, Vandewal, Koen

“…Organic photodetectors (OPDs) with a performance comparable to that of conventional inorganic ones have recently been demonstrated for the visible regime…”
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A History and Perspective of Non‐Fullerene Electron Acceptors for Organic Solar Cells by Armin, Ardalan, Li, Wei, Sandberg, Oskar J., Xiao, Zuo, Ding, Liming, Nelson, Jenny, Neher, Dieter, Vandewal, Koen, Shoaee, Safa, Wang, Tao, Ade, Harald, Heumüller, Thomas, Brabec, Christoph, Meredith, Paul

“…Organic solar cells are composed of electron donating and accepting organic semiconductors. Whilst a significant palette of donors has been developed over…”
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Charge-generating mid-gap trap states define the thermodynamic limit of organic photovoltaic devices by Zarrabi, Nasim, Sandberg, Oskar J., Zeiske, Stefan, Li, Wei, Riley, Drew B., Meredith, Paul, Armin, Ardalan

“…Detailed balance is a cornerstone of our understanding of artificial light-harvesting systems. For next generation organic solar cells, this involves…”
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Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes by Armin, Ardalan, Jansen-van Vuuren, Ross D., Kopidakis, Nikos, Burn, Paul L., Meredith, Paul

“…Spectrally selective light detection is vital for full-colour and near-infrared (NIR) imaging and machine vision. This is not possible with traditional…”
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Organic Photodiodes: The Future of Full Color Detection and Image Sensing by Jansen-van Vuuren, Ross D., Armin, Ardalan, Pandey, Ajay K., Burn, Paul L., Meredith, Paul

“…Major growth in the image sensor market is largely as a result of the expansion of digital imaging into cameras, whether stand‐alone or integrated within smart…”
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The Optical Constants of Solution‐Processed Semiconductors—New Challenges with Perovskites and Non‐Fullerene Acceptors by Kerremans, Robin, Kaiser, Christina, Li, Wei, Zarrabi, Nasim, Meredith, Paul, Armin, Ardalan

“…Accurate determination of the optical constants of thin film solids has been an ongoing endeavor in optoelectronics and related fields for decades. These…”
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On the Origin of the Ideality Factor in Perovskite Solar Cells by Caprioglio, Pietro, Wolff, Christian M., Sandberg, Oskar J., Armin, Ardalan, Rech, Bernd, Albrecht, Steve, Neher, Dieter, Stolterfoht, Martin

“…The measurement of the ideality factor (nid) is a popular tool to infer the dominant recombination type in perovskite solar cells (PSC). However, the true…”
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Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing by Yazmaciyan, Aren, Meredith, Paul, Armin, Ardalan

“…Color discrimination in photodetection is conventionally achieved using broadband‐absorbing inorganic semiconductors with passive optical filters. Organic…”
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Determining Ultralow Absorption Coefficients of Organic Semiconductors from the Sub‐Bandgap Photovoltaic External Quantum Efficiency by Kaiser, Christina, Zeiske, Stefan, Meredith, Paul, Armin, Ardalan

“…Energy states below the bandgap of a semiconductor, such as trap states or charge transfer states in organic donor–acceptor blends, can contribute to light…”
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Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques by Sandberg, Oskar J, Tvingstedt, Kristofer, Meredith, Paul, Armin, Ardalan

“…Transient photovoltage (TPV) is a technique frequently used to determine charge carrier lifetimes in thin-film solar cells such as organic, dye-sensitized, and…”
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Enhanced SWIR Light Detection in Organic Semiconductor Photodetectors through Up‐Conversion of Mid‐Gap Trap States by Zeiske, Stefan, Zarrabi, Nasim, Sandberg, Oskar J., Gielen, Sam, Maes, Wouter, Meredith, Paul, Armin, Ardalan

“…Shortwave‐infrared (SWIR) photodetectors are vital for many scientific and industrial applications including surveillance, quality control and inspection. In…”
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Limitations of Charge Transfer State Parameterization Using Photovoltaic External Quantum Efficiency by Armin, Ardalan, Zarrabi, Nasim, Sandberg, Oskar J., Kaiser, Christina, Zeiske, Stefan, Li, Wei, Meredith, Paul

“…Free carrier photogeneration in bulk‐heterojunction solar cells composed of blends of acceptor and donor organic semiconductors proceeds via intermolecular…”
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Understanding Performance Limiting Interfacial Recombination in pin Perovskite Solar Cells by Warby, Jonathan, Zu, Fengshuo, Zeiske, Stefan, Gutierrez‐Partida, Emilio, Frohloff, Lennart, Kahmann, Simon, Frohna, Kyle, Mosconi, Edoardo, Radicchi, Eros, Lang, Felix, Shah, Sahil, Peña‐Camargo, Francisco, Hempel, Hannes, Unold, Thomas, Koch, Norbert, Armin, Ardalan, De Angelis, Filippo, Stranks, Samuel D., Neher, Dieter, Stolterfoht, Martin

“…Perovskite semiconductors are an attractive option to overcome the limitations of established silicon based photovoltaic (PV) technologies due to their…”
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Charge Generation Pathways in Organic Solar Cells: Assessing the Contribution from the Electron Acceptor by Stoltzfus, Dani M, Donaghey, Jenny E, Armin, Ardalan, Shaw, Paul E, Burn, Paul L, Meredith, Paul

“…Photocurrent generation in organic bulk heterojunction (BHJ) solar cells is most commonly understood as a process which predominantly involves photoexcitation…”
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