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Mostafa Rabie Shlaly Bahr Othman

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Beyond Flat: Undulated Perovskite Solar Cells on Microscale Si Pyramids by Solution Processing

Christophe Ballif, Aïcha Hessler-Wyser, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Deniz Türkay, Kerem Artuk

Microscale pyramids of silicon solar cells are often considered incompatible with solution-processed perovskite films. Thus, solution processing has mainly been used with submicron pyramids that are buried under thick perovskite films with flattened front ...

AMER CHEMICAL SOC2025

Aryl-Acetylene Layered Hybrid Perovskites in Photovoltaics

Michael Graetzel, Christophe Ballif, Ursula Röthlisberger, Aïcha Hessler-Wyser, Felix Thomas Eickemeyer, Lukas Pfeifer, Christian Michael Wolff, Virginia Carnevali, Nikolaos Lempesis, Mostafa Rabie Shlaly Bahr Othman

Metal halide perovskites have shown exceptional potential in converting solar energy to electric power in photovoltaics, yet their application is hampered by limited operational stability. This stimulated the development of hybrid layered (two-dimensional, ...

WILEY-V C H VERLAG GMBH2025

Making from Breaking: Degradation Inversion Enables Vapor-Phase Synthesis of Halide Perovskites in Ambient Conditions

Christophe Ballif, Aïcha Hessler-Wyser, Christian Michael Wolff, Austin George Kuba, Mostafa Rabie Shlaly Bahr Othman, Kerem Artuk

Vapor phase deposition of formamidinium-rich perovskites is hampered by the decomposition of formamidine in the vapor phase. We use the reversibility of this reaction to establish a dynamic equilibrium that enables the vapor-phase synthesis of formamidiniu ...

American Chemical Society (ACS)2025

Suppression of Stacking Faults for Stable Formamidinium-Rich Perovskite Absorbers

Christophe Ballif, Ursula Röthlisberger, Aïcha Hessler-Wyser, Christian Michael Wolff, Virginia Carnevali, Nikolaos Lempesis, Lorenzo Agosta, Austin George Kuba, Mostafa Rabie Shlaly Bahr Othman, Kerem Artuk

The poor intrinsic perovskite absorber stability is arguably a central limitation challenging the prospect of commercialization for photovoltaic (PV) applications. Understanding the nanoscopic structural features that trigger instabilities in perovskite ma ...

WILEY-V C H VERLAG GMBH2025

Assessing the Influence of Illumination on Ion Conductivity in Perovskite Solar Cells

Christophe Ballif, Aïcha Hessler-Wyser, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman

Whether illumination influences the ion conductivity in lead-halide perovskite solar cells containing iodide halides has been an ongoing debate. Experiments to elucidate the presence of a photoconductive effect require special devices or measurement techni ...

2024

Bifacial perovskite/silicon heterojunction tandem solar cells based on FAPbI3-based perovskite via hybrid evaporation-spin coating

Christophe Ballif, Aïcha Hessler-Wyser, Mounir Driss Mensi, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Deniz Türkay, Kerem Artuk

Combining the two technologies of tandem solar cells and bifacial solar cells has a great potential to maximize energy harvesting while minimizing material and surface usage. Mid-bandgap perovskites (1.50–1.60 eV) are important for fulfilling current match ...

Elsevier2024

Linking Nanoscopic Insights to Millimetric-Devices in Formamidinium-Rich Perovskite Photovoltaics

Christophe Ballif, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Mostafa Rabie Shlaly Bahr Othman

Halide-perovskite semiconductors have a high potential for use in single-junction and tandem solar cells. Despite their unprecedented rise in power conversion efficiencies (PCEs) for photovoltaic (PV) applications, it remains unclear whether perovskite sol ...

Wiley-V C H Verlag Gmbh2024

Improving the operational stability of perovskite solar cells with cesium-doped graphene oxide interlayer

Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Lukas Pfeifer, Christian Michael Wolff, Rita Therisod, Mostafa Rabie Shlaly Bahr Othman, Hong Zhang, Masaud Hassan S Almalki

Perovskite solar cells (PSCs) have made great advances in terms of power conversion efficiency (PCE), yet their subpar stability continues to hinder their commercialization. The interface between the perovskite layer and the charge-carrier transporting lay ...

Elsevier2024

A Universal Perovskite/C60 Interface Modification via Atomic Layer Deposited Aluminum Oxide for Perovskite Solar Cells and Perovskite-Silicon Tandems

Christophe Ballif, Aïcha Hessler-Wyser, Mounir Driss Mensi, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Deniz Türkay, Kerem Artuk

The primary performance limitation in inverted perovskite-based solar cells is the interface between the fullerene-based electron transport layers and the perovskite. Atomic layer deposited thin aluminum oxide (AlOX) interlayers that reduce nonradiative re ...

Wiley-V C H Verlag Gmbh2024

Blade-Coating of High Crystallinity Cesium-Formamidinium Perovskite Formulations

Christophe Ballif, Aïcha Hessler-Wyser, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Anaël Morgane Jaffrès

Up-scalable coating processes need to be developed to manufacture efficient and stable perovskite-based solar modules. In this work, we combine two Lewis base additives (N,N′-dimethylpropyleneurea and thiourea) to fabricate high-quality Cs0.15FA0.85PbI3 pe ...

2024

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A Universal Perovskite/C60 Interface Modification via Atomic Layer Deposited Aluminum Oxide for Perovskite Solar Cells and Perovskite-Silicon Tandems

Christophe Ballif, Aïcha Hessler-Wyser, Mounir Driss Mensi, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Deniz Türkay, Kerem Artuk

Wiley-V C H Verlag Gmbh2024

Suppression of Stacking Faults for Stable Formamidinium-Rich Perovskite Absorbers

WILEY-V C H VERLAG GMBH2025

Bifacial perovskite/silicon heterojunction tandem solar cells based on FAPbI3-based perovskite via hybrid evaporation-spin coating

Christophe Ballif, Aïcha Hessler-Wyser, Mounir Driss Mensi, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Deniz Türkay, Kerem Artuk

Elsevier2024

Improving the operational stability of perovskite solar cells with cesium-doped graphene oxide interlayer

Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Lukas Pfeifer, Christian Michael Wolff, Rita Therisod, Mostafa Rabie Shlaly Bahr Othman, Hong Zhang, Masaud Hassan S Almalki

Elsevier2024

Blade-Coating of High Crystallinity Cesium-Formamidinium Perovskite Formulations

Christophe Ballif, Aïcha Hessler-Wyser, Christian Michael Wolff, Mostafa Rabie Shlaly Bahr Othman, Anaël Morgane Jaffrès

2024