Search Results - "Howard, Ian A"

Photon Upconversion for Photovoltaics and Photocatalysis: A Critical Review by Richards, Bryce S, Hudry, Damien, Busko, Dmitry, Turshatov, Andrey, Howard, Ian A

“…Opportunities for enhancing solar energy harvesting using photon upconversion are reviewed. The increasing prominence of bifacial solar cells is an enabling…”
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Coated and Printed Perovskites for Photovoltaic Applications by Howard, Ian A., Abzieher, Tobias, Hossain, Ihteaz M., Eggers, Helge, Schackmar, Fabian, Ternes, Simon, Richards, Bryce S., Lemmer, Uli, Paetzold, Ulrich W.

“…Hybrid organic–inorganic metal halide perovskite semiconductors provide opportunities and challenges for the fabrication of low‐cost thin‐film photovoltaic…”
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Record Open‐Circuit Voltage Wide‐Bandgap Perovskite Solar Cells Utilizing 2D/3D Perovskite Heterostructure by Gharibzadeh, Saba, Abdollahi Nejand, Bahram, Jakoby, Marius, Abzieher, Tobias, Hauschild, Dirk, Moghadamzadeh, Somayeh, Schwenzer, Jonas A., Brenner, Philipp, Schmager, Raphael, Haghighirad, Amir Abbas, Weinhardt, Lothar, Lemmer, Uli, Richards, Bryce S., Howard, Ian A., Paetzold, Ulrich W.

“…In this work, the authors realize stable and highly efficient wide‐bandgap perovskite solar cells that promise high power conversion efficiencies (PCE) and are…”
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Effect of Morphology on Ultrafast Free Carrier Generation in Polythiophene:Fullerene Organic Solar Cells by Howard, Ian A, Mauer, Ralf, Meister, Michael, Laquai, Frédéric

“…Despite significant study, the precise mechanisms that dictate the efficiency of organic photovoltaic cells, such as charge separation and recombination, are…”
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Continuous wave amplified spontaneous emission in phase-stable lead halide perovskites by Brenner, Philipp, Bar-On, Ofer, Jakoby, Marius, Allegro, Isabel, Richards, Bryce S., Paetzold, Ulrich W., Howard, Ian A., Scheuer, Jacob, Lemmer, Uli

“…Sustained stimulated emission under continuous-wave (CW) excitation is a prerequisite for new semiconductor materials being developed for laser gain media…”
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Probing the pathways of free charge generation in organic bulk heterojunction solar cells by Kurpiers, Jona, Ferron, Thomas, Roland, Steffen, Jakoby, Marius, Thiede, Tobias, Jaiser, Frank, Albrecht, Steve, Janietz, Silvia, Collins, Brian A., Howard, Ian A., Neher, Dieter

“…The fact that organic solar cells perform efficiently despite the low dielectric constant of most photoactive blends initiated a long-standing debate regarding…”
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Dual-color dynamic anti-counterfeiting labels with persistent emission after visible excitation allowing smartphone authentication by Katumo, Ngei, Li, Kai, Richards, Bryce S., Howard, Ian A.

“…A significant impediment to the deployment of anti-counterfeiting technologies is the reliance on specialized hardware. Here, anti-counterfeiting labels are…”
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Photon Upconversion at Crystalline Organic-Organic Heterojunctions by Oldenburg, Michael, Turshatov, Andrey, Busko, Dmitry, Wollgarten, Stephanie, Adams, Michael, Baroni, Nicolò, Welle, Alexander, Redel, Engelbert, Wöll, Christof, Richards, Bryce S., Howard, Ian A.

“…Triplet transfer across a surface‐anchored metal–organic‐framework heterojunction is demonstrated by the observation of triplet–triplet annihilation photon…”
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Guest-responsive polaritons in a porous framework: chromophoric sponges in optical QED cavities by Haldar, Ritesh, Fu, Zhihua, Joseph, Reetu, Herrero, David, Martín-Gomis, Luis, Richards, Bryce S, Howard, Ian. A, Sastre-Santos, Angela, Wöll, Christof

“…Introducing porous material into optical cavities is a critical step toward the utilization of quantum-electrodynamical (QED) effects for advanced…”
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Ultrafast Exciton Dissociation Followed by Nongeminate Charge Recombination in PCDTBT:PCBM Photovoltaic Blends by Etzold, Fabian, Howard, Ian A, Mauer, Ralf, Meister, Michael, Kim, Tae-Dong, Lee, Kwang-Sup, Baek, Nam Seob, Laquai, Frédéric

“…The precise mechanism and dynamics of charge generation and recombination in bulk heterojunction polymer:fullerene blend films typically used in organic…”
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The Effect of Solvent Additives on Morphology and Excited-State Dynamics in PCPDTBT:PCBM Photovoltaic Blends by Etzold, Fabian, Howard, Ian A, Forler, Nina, Cho, Don M, Meister, Michael, Mangold, Hannah, Shu, Jie, Hansen, Michael Ryan, Müllen, Klaus, Laquai, Frédéric

“…The dependence of the thin film morphology and excited-state dynamics for the low-bandgap donor–acceptor copolymer…”
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Anisotropic energy transfer in crystalline chromophore assemblies by Haldar, Ritesh, Jakoby, Marius, Mazel, Antoine, Zhang, Qiang, Welle, Alexander, Mohamed, Tawheed, Krolla, Peter, Wenzel, Wolfgang, Diring, Stéphane, Odobel, Fabrice, Richards, Bryce S., Howard, Ian A., Wöll, Christof

“…An ideal material for photon harvesting must allow control of the exciton diffusion length and directionality. This is necessary in order to guide excitons to…”
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Effect of Nongeminate Recombination on Fill Factor in Polythiophene/Methanofullerene Organic Solar Cells by Mauer, Ralf, Howard, Ian A, Laquai, Frédéric

“…A key factor in solar cell efficiency is the dependence of the photocurrent on applied bias. With respect to organic solar cells, it is often suggested that…”
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Tuning Optical Properties by Controlled Aggregation: Electroluminescence Assisted by Thermally‐Activated Delayed Fluorescence from Thin Films of Crystalline Chromophores by Haldar, Ritesh, Jakoby, Marius, Kozlowska, Mariana, Rahman Khan, Motiur, Chen, Hongye, Pramudya, Yohanes, Richards, Bryce S., Heinke, Lars, Wenzel, Wolfgang, Odobel, Fabrice, Diring, Stéphane, Howard, Ian A., Lemmer, Uli, Wöll, Christof

“…Several photophysical properties of chromophores depend crucially on intermolecular interactions. Thermally‐activated delayed fluorescence (TADF) is often…”
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Vacuum‐Assisted Growth of Low‐Bandgap Thin Films (FA0.8MA0.2Sn0.5Pb0.5I3) for All‐Perovskite Tandem Solar Cells by Abdollahi Nejand, Bahram, Hossain, Ihteaz M., Jakoby, Marius, Moghadamzadeh, Somayeh, Abzieher, Tobias, Gharibzadeh, Saba, Schwenzer, Jonas A., Nazari, Pariya, Schackmar, Fabian, Hauschild, Dirk, Weinhardt, Lothar, Lemmer, Uli, Richards, Bryce S., Howard, Ian A., Paetzold, Ulrich W.

“…All‐perovskite multijunction photovoltaics, combining a wide‐bandgap (WBG) perovskite top solar cell (EG ≈1.6–1.8 eV) with a low‐bandgap (LBG) perovskite…”
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Correlated Donor/Acceptor Crystal Orientation Controls Photocurrent Generation in All-Polymer Solar Cells by Schubert, Marcel, Collins, Brian A., Mangold, Hannah, Howard, Ian A., Schindler, Wolfram, Vandewal, Koen, Roland, Steffen, Behrends, Jan, Kraffert, Felix, Steyrleuthner, Robert, Chen, Zhihua, Fostiropoulos, Konstantinos, Bittl, Robert, Salleo, Alberto, Facchetti, Antonio, Laquai, Frédéric, Ade, Harald W., Neher, Dieter

“…New polymers with high electron mobilities have spurred research in organic solar cells using polymeric rather than fullerene acceptors due to their potential…”
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Experimental validation of a modeling framework for upconversion enhancement in 1D-photonic crystals by Hofmann, Clarissa L. M., Fischer, Stefan, Eriksen, Emil H., Bläsi, Benedikt, Reitz, Christian, Yazicioglu, Deniz, Howard, Ian A., Richards, Bryce S., Goldschmidt, Jan Christoph

“…Photonic structures can be designed to tailor luminescence properties of materials, which becomes particularly interesting for non-linear phenomena, such as…”
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Nonequilibrium Charge Dynamics in Organic Solar Cells by Howard, Ian A., Etzold, Fabian, Laquai, Frédéric, Kemerink, Martijn

“…The dynamics of charge carriers after their creation at, or near, an interface play a critical role in determining the efficiency of organic solar cells as…”
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Polythiophene:Perylene Diimide Solar Cells - the Impact of Alkyl-Substitution on the Photovoltaic Performance by Kamm, Valentin, Battagliarin, Glauco, Howard, Ian A., Pisula, Wojciech, Mavrinskiy, Alexey, Li, Chen, Müllen, Klaus, Laquai, Frédéric

“…The photovoltaic parameters, i.e., the short‐circuit current, open‐circuit voltage and device fill factor, of bulk heterojunction solar cells that use perylene…”
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A de novo strategy for predictive crystal engineering to tune excitonic coupling by Haldar, Ritesh, Mazel, Antoine, Krstić, Marjan, Zhang, Qiang, Jakoby, Marius, Howard, Ian A., Richards, Bryce S., Jung, Nicole, Jacquemin, Denis, Diring, Stéphane, Wenzel, Wolfgang, Odobel, Fabrice, Wöll, Christof

“…In molecular solids, the intense photoluminescence (PL) observed for solvated dye molecules is often suppressed by nonradiative decay processes introduced by…”
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