| People | Locations | Statistics |
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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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Zierold, Robert
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Enhanced Photocatalytic Properties and Photoinduced Crystallization of TiO2–Fe2O3 Inverse Opals Fabricated by Atomic Layer Deposition
- 2024Quantum Dot/TiO2 Nanocomposite-Based Photoelectrochemical Sensor for Enhanced H2O2 Detection Applied for Cell Monitoring and Visualization
- 2024Enhancing Charge Transport in CuBi<sub>2</sub>O<sub>4</sub> Films: The Role of a Protective TiO<sub>2</sub> ALD Coating Probed by Impedance Spectroscopy
- 2024A Nanomechanical Transducer for Remote Signal Transmission onto the Tympanic Membrane–Playing Music on a Different Drumcitations
- 2024Quantum Dot/TiO2 Nanocomposite‐Based Photoelectrochemical Sensor for Enhanced H<sub>2</sub>O<sub>2</sub> Detection Applied for Cell Monitoring and Visualizationcitations
- 2024Reducing the Thermal Effects during Coating of Superconducting Radio-Frequency Cavities: A Case Study for Atomic Layer Deposition of Alumina with a Combined Numerical and Experimental Approachcitations
- 2022Field emission characteristics of ZnO nanowires grown by catalyst-assisted MOCVD on free-standing inorganic nanomembranescitations
- 2021Influence of Alumina Addition on the Optical Properties and the Thermal Stability of Titania Thin Films and Inverse Opals Produced by Atomic Layer Deposition
- 2019Chemistry of Shape-Controlled Iron Oxide Nanocrystal Formationcitations
- 2019Electrochemical Engineering of Nanoporous Materials for Photocatalysis: Fundamentals, Advances, and Perspectivescitations
- 2018Photonic materials for high-temperature applications: synthesis and characterization by X-ray ptychographic tomography
- 2017Highly porous α-Al 2 O 3 ceramics obtained by sintering atomic layer deposited inverse opals
- 2015Enhanced structural and phase stability of titania inverse opalscitations
- 2015Mechanism that governs the electro-optic response of second-order nonlinear polymers on silicon substratescitations
- 2013Magnetite Nanotubes and Nickel Nanorods of Low Aspect Ratios : From Synthesis to Application in Ferrofluidic Suspensions ; Magnetit Nanoröhrchen und Nickel Nanostäbchen mit kurzem Aspektverhältnis : Von der Synthese bis hin zur Anwendung in ferrofluidischen Suspensionen
Places of action
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article
Enhancing Charge Transport in CuBi<sub>2</sub>O<sub>4</sub> Films: The Role of a Protective TiO<sub>2</sub> ALD Coating Probed by Impedance Spectroscopy
Abstract
<jats:title>Abstract</jats:title><jats:p>The common solution for protecting p‐type semiconductors against photocorrosion in a photo‐electrochemical (PEC) cell is by applying a TiO<jats:sub>2</jats:sub> over‐layer via atomic layer deposition (ALD). However, for the case of CuBi<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub> (CBO), this approach leads to a significant decline in electrode performance, despite the small conduction band offset between CBO and TiO<jats:sub>2</jats:sub>. Here, electrochemical impedance spectroscopy (EIS) under light illumination is used to study how to enhance charge transport in CuBi<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>/TiO<jats:sub>2</jats:sub> photocathodes. A 15 nm TiO<jats:sub>2</jats:sub> overlayer enables a small charge transfer resistance to the electrolyte while preserving the performance and stability of the CBO film. When increasing the TiO<jats:sub>2</jats:sub> thickness from 15 to 20 nm, the photogenerated currents decrease by 74%. The EIS data are fit with an equivalent circuit model that enabled to extract the charge transfer resistances, capacitances, and time constants that influence the PEC performance of the electrode as a function of the TiO<jats:sub>2</jats:sub> layer thickness, together with the flat‐band potentials and doping densities of both the CBO and TiO<jats:sub>2</jats:sub> layers under light illumination. The decline in performance is attributed to accumulation and recombination of photogenerated carriers at the CBO‐TiO<jats:sub>2</jats:sub> interface, due to a band mismatch between the two semiconductors.</jats:p>