Publications de Quentin Thomas Jeangros

Unveiling the GeI2-Assisted Oriented Growth of Perovskite Crystallite for High-Performance Flexible Sn Perovskite Solar Cells

Tin perovskites are emerging as promising alternatives to their lead-based counterparts for high-performance and flexible perovskite solar cells. However, their rapid crystallization often leads to inadequate film quality and poor device performance. In th ...

2025

Alleviating nanostructural phase impurities enhances the optoelectronic properties, device performance and stability of cesium-formamidinium metal-halide perovskites

Christophe Ballif, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Christian Michael Wolff, Beat Ruhstaller, Daniel Anthony Jacobs, Austin George Kuba, Mostafa Rabie Shlaly Bahr Othman, Anaël Morgane Jaffrès

The technique of alloying FA+ with Cs+ is often used to promote structural stabilization of the desirable alpha-FAPbI3 phase in halide perovskite devices. However, the precise mechanisms by which these alloying approaches improve the optoelectronic quality ...

Royal Soc Chemistry2024

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

Synergetic substrate and additive engineering for over 30%-efficient perovskite-Si tandem solar cells

Christophe Ballif, Quentin Thomas Jeangros, Mounir Driss Mensi, Christian Michael Wolff, Daniel Anthony Jacobs, Deniz Türkay, Kerem Artuk, Mathieu Gérard Boccard, Xin Yu Chin

Perovskite-silicon (Si) tandem solar cells are the most prominent contenders to succeed single-junction Si cells that dominate the market today. Yet, to justify the added cost of inserting a perovskite cell on top of Si, these devices should first exhibit ...

2024

Potential-induced degradation in bifacial silicon heterojunction solar modules: Insights and mitigation strategies

Christophe Ballif, Quentin Thomas Jeangros, Alessandro Francesco Aldo Virtuani, Olatz Arriaga Arruti, Luca Gnocchi

Potential-induced degradation (PID) may be a serious concern in photovoltaic (PV) modules and plants, particularly when approaching high system voltages (1500+ V). Here, we investigate PID occurring in bifacial rear-emitter silicon heterojunction (SHJ) sol ...

Wiley2023

Rear textured p-type high temperature passivating contacts and their implementation in perovskite/silicon tandem cells

Christophe Ballif, Quentin Thomas Jeangros, Antoine Descoeudres, Andrea Ingenito, Arnaud Walter, Sylvain Nicolay, Soo-Jin Moon, Philippe Wyss

Silicon solar cells based on high temperature passivating contacts are becoming mainstream in the photovoltaic industry. Here, we developed a high-quality boron-doped poly-silicon hole contact. When combined with a co-processed phosphorus-doped poly-silico ...

Royal Soc Chemistry2023

Operando analysis of a solid oxide fuel cell by environmental transmission electron microscopy

Jan Van Herle, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Stefan Diethelm, Cédric Frantz

Correlating the microstructure of an energy conversion device to its performance is often a complex exercise, notably in solid oxide fuel cell research. Solid oxide fuel cells combine multiple materials and interfaces that evolve in time due to high operat ...

Nature Portfolio2023

Interface passivation for 31.25%-efficient perovskite/silicon tandem solar cells

Christophe Ballif, Quentin Thomas Jeangros, Mounir Driss Mensi, Christian Michael Wolff, Daniel Anthony Jacobs, Deniz Türkay, Kerem Artuk, Mathieu Gérard Boccard, Peter Joseph Fiala, Quentin Jean-Marie Armand Guesnay

Silicon solar cells are approaching their theoretical efficiency limit of 29%. This limitation can be exceeded with advanced device architectures, where two or more solar cells are stacked to improve the harvesting of solar energy. In this work, we devise ...

American Association for the Advancement of Science2023

Correlating light-induced deep defects and phase segregation in mixed-halide perovskites

Quentin Thomas Jeangros, Jakub Holovsky, Christian Michael Wolff, Peter Joseph Fiala, Xin Yu Chin

Mixed-halide perovskites are highly promising materials for tandem solar cells. The phenomenon of phase segregation, however hinders their application. Here, we combine Fourier-Transform photocurrent spectroscopy with photoluminescence and current density- ...

Royal Society of Chemistry2022

Monolithic Perovskite-Silicon Tandem Solar Cells: From the Lab to Fab?

Christophe Ballif, Quentin Thomas Jeangros, Antonin Faes, Fan Fu, Chien-Jen Yang

This review focuses on monolithic 2-terminal perovskite-silicon tandem solar cells and discusses key scientific and technological challenges to address in view of an industrial implementation of this technology. The authors start by examining the different ...

Wiley-V C H Verlag Gmbh2022