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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bein, Thomas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024The balancing act between high electronic and low ionic transport influenced by perovskite grain boundariescitations
- 2024Contrasting ultra-low frequency Raman and infrared modes in emerging metal halides for photovoltaicscitations
- 2024Tunable Isometric Donor‐Acceptor Wurster‐Type Covalent Organic Framework Photocathodescitations
- 2023Cu/Ag–Sb–I Rudorffite Thin Films for Photovoltaic Applicationscitations
- 2022Silver-Bismuth Based 2D Double Perovskites (4FPEA)(4)AgBiX8 (X = Cl, Br, I): Highly Oriented Thin Films with Large Domain Sizes and Ultrafast Charge-Carrier Localizationcitations
- 2022Heterovalent Tin Alloying in Layered MA3Sb2I9 Thin Films: Assessing the Origin of Enhanced Absorption and Self-Stabilizing Charge Statescitations
- 2021Roadmap on organic-inorganic hybrid perovskite semiconductors and devicescitations
- 2021Increasing Photostability of Inverted Nonfullerene Organic Solar Cells by Using Fullerene Derivative Additivescitations
- 2021An Electrically Conducting Three‐Dimensional Iron–Catecholate Porous Frameworkcitations
- 20211,10-Phenanthroline as an Efficient Bifunctional Passivating Agent for MAPbI3 Perovskite Solar Cellscitations
- 2020Optoelectronic Properties of $Cs_{2}AgBiBr_{6}$ Thin Films: The Influence of Precursor Stoichiometrycitations
- 2020Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing.
- 2019Shedding Light on the Moisture Stability of 3D/2D Hybrid Perovskite Heterojunction Thin Filmscitations
- 2018Single-crystal-like optoelectronic-properties of MAPbI3 perovskite polycrystalline thin filmscitations
- 2017In situ study of spray deposited titania photoanodes for scalable fabrication of solid-state dye-sensitized solar cellscitations
- 2016Toward Tailored Film Morphologiescitations
- 2016Hybrid Perovskite/Perovskite Heterojunction Solar Cellscitations
- 2016Synthesis of Perfectly Oriented and Micrometer-Sized MAPbBr(3) Perovskite Crystals for Thin-Film Photovoltaic Applicationscitations
- 2016Spray Deposition of Titania Films with Incorporated Crystalline Nanoparticles for All-Solid-State Dye-Sensitized Solar Cells Using P3HTcitations
- 2015Reversible Hydration of CH3NH3Pbl3 in Films, Single Crystals, and Solar Cellscitations
- 2015Reversible hydration of CH3NH3PbI3 in films, single crystals, and solar cellscitations
- 2015A Closer Look into Two-Step Perovskite Conversion with X-ray Scatteringcitations
- 2014Tin doping speeds up hole transfer during light-driven water oxidation at hematite photoanodescitations
- 2014Bright light-emitting diodes based on organometal halide perovskite.
- 2014Influence of the orientation of methylammonium lead iodide perovskite crystals on solar cell performancecitations
- 2014Atomic-layer-deposited aluminum and zirconium oxides for surface passivation of TiO 2 in high-efficiency organic photovoltaicscitations
- 2013Formation of hexagonal and cubic fluorescent periodic mesoporous organosilicas in the channels of anodic alumina membranescitations
Places of action
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article
Tin doping speeds up hole transfer during light-driven water oxidation at hematite photoanodes
Abstract
Numerous studies have shown that the performance of hematite photoanodes for light-driven water splitting is improved substantially by doping with various metals, including tin. Although the enhanced performance has commonly been attributed to bulk effects such as increased conductivity, recent studies have noted an impact of doping on the efficiency of the interfacial transfer of holes involved in the oxygen evolution reaction. However, the methods used were not able to elucidate the origin of this improved efficiency, which could originate from passivation of surface electron-hole recombination or catalysis of the oxygen evolution reaction. The present study used intensity-modulated photocurrent spectroscopy (IMPS), which is a powerful small amplitude perturbation technique that can de-convolute the rate constants for charge transfer and recombination at illuminated semiconductor electrodes. The method was applied to examine the kinetics of water oxidation on thin solution-processed hematite model photoanodes, which can be Sn-doped without morphological change. We observed a significant increase in photocurrent upon Sn-doping, which is attributed to a higher transfer efficiency. The kinetic data obtained using IMPS show that Sn-doping brings about a more than tenfold increase in the rate constant for water oxidation by photogenerated holes. This result provides the first demonstration that Sn-doping speeds up water oxidation on hematite by increasing the rate constant for hole transfer.