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Mathieu Gérard Boccard

Cette personne a quitté l’EPFL

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Publications associées (73)

Page 4 sur 4

Comparative Field Performance Assessment of Bifacial Solar Modules

Mathieu Gérard Boccard, Jean Cattin, Olivier Denis Dupré

A full-scale pilot line for producing bifacial solar modules based on silicon heterojunction technology was set up as part of the European H2020 AMPERE project. In this study, the measurements from two outdoor test benches were used to evaluate the perform ...

IEEE2020

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

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

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

Effects of work function and electron affinity on the performance of carrier-selective contacts in silicon solar cells using $ZnSn_{x}Ge_{1-x}N_{2}$ as a case study

Christophe Ballif, Mathieu Gérard Boccard, Jonathan Emanuel Thomet, Luca Massimiliano Antognini, Julie Amandine Dreon, Vincent Philippe Paratte, Julien Hurni

2021

High-efficiency microcrystalline silicon single-junction solar cells

Christophe Ballif, Matthieu Despeisse, Mathieu Gérard Boccard, Jordi Escarre Palou, Grégory Bugnon, Gaetano Parascandolo, Simon Hänni

This short communication highlights our latest results towards high-efficiency microcrystalline silicon single-junction solar cells. By combining adequate cell design with high-quality material, a new world record efficiency was achieved for single-junctio ...

Wiley-Blackwell2013

Toward Annealing-Stable Molybdenum-Oxide-Based Hole-Selective Contacts For Silicon Photovoltaics

Christophe Ballif, Mathieu Gérard Boccard, Stefaan De Wolf, Monica Morales Masis, Jérémie Werner, Philipp Friedrich Hermann Löper, Jonas Geissbühler, Oscar Esteban Rucavado Leandro, Julie Amandine Dreon, Stephanie Essig

Molybdenum oxide (MoOX) combines a high work function with broadband optical transparency. Sandwiched between a hydrogenated intrinsic amorphous silicon passivation layer and a transparent conductive oxide, this material allows a highly efficient hole‐sele ...

2018

Self-Patterned Nanoparticle Layers for Vertical Interconnects: Application in Tandem Solar Cells

Christophe Ballif, Franz-Josef Haug, Aïcha Hessler-Wyser, Mathieu Gérard Boccard, Björn Niesen, Michael Elias Stückelberger, Fanny Sculati-Meillaud

We demonstrate self-patterned insulating nanoparticle layers to define local electrical interconnects in thin-film electronic devices. We show this with thin-film silicon tandem solar cells, where we introduce between the two component cells a solution-pro ...

American Chemical Society2014

Light trapping in solar cells: numerical modeling with measured surface textures

Christophe Ballif, Franz-Josef Haug, Mathieu Gérard Boccard, Thomas Andreas Lanz

We present and experimentally validate a computational model for the light propagation in thin-film solar cells that integrates non-paraxial scalar diffraction theory with non-sequential ray-tracing. The model allows computing the spectral layer absorbance ...

Optical Society of America2015

Development of N-Type Amorphous and Microcrystalline Hydrogenated Silicon-Oxides (SiOx:H) and Investigation of their Impact as Window Layers on Silicon Heterojunction Solar Cells Device

Christophe Ballif, Mathieu Gérard Boccard, Jan Haschke, Jean Cattin

We report on the development of hydrogenated n-type amorphous and microcrystalline silicon oxides ((n)-SiOx:H and (n) mu c-SiOx:H, respectively) by PECVD, and their successful integration as n-window layers for silicon heterojunction (SHJ) solar cells devi ...

IEEE2019

Hole-Selective Front Contact Stack Enabling 24.1%-Efficient Silicon Heterojunction Solar Cells

Minh Truong, Christophe Ballif, Matthieu Despeisse, Sylvain Nicolay, Mathieu Gérard Boccard, Jan Haschke, Bertrand Yves Paul Paviet-Salomon, Luca Massimiliano Antognini, Jean Cattin, Julie Amandine Dreon, Vincent Philippe Paratte, Laurie-Lou Senaud

The window-layer stack limits the efficiency of both-side-contacted silicon heterojunction solar cells. We discuss here the combination of several modifications to this stack to improve its optoelectronic performance. These include the introduction of a na ...

2020

Degradation Mechanism and Stability Improvement of Dopant-Free ZnO/LiFx/Al Electron Nanocontacts in Silicon Heterojunction Solar Cells

Christophe Ballif, Mathieu Gérard Boccard, Quentin Thomas Jeangros, Jonathan Emanuel Thomet, Luca Massimiliano Antognini, Julie Amandine Dreon, Vincent Philippe Paratte, Sihua Zhong

Dopant-free passivating contacts for photovoltaics have the potential to be deposited at low costs, while providing excellent surface passivation and low contact resistance. However, one pressing issue of dopant-free carrier selective contacts is their low ...

2020

Monocrystalline 1.7-eV MgCdTe solar cells

Mathieu Gérard Boccard

Monocrystalline 1.7 eV Mg0.13Cd0.87Te/MgxCd1-xTe (x > 0.13) double heterostructure (DH) solar cells with varying Mg compositions in the barrier layers are grown by molecular beam epitaxy. A Mg0.13Cd0.87Te/Mg0.37Cd0.63Te DH solar cell featuring abrupt inter ...

AIP Publishing2022

Amorphous Si Thin Film Based Photocathodes with High Photovoltage for Efficient Hydrogen Production

Christophe Ballif, Mathieu Gérard Boccard, Corsin Battaglia

An amorphous Si thin film with TiO2 encapsulation layer is demonstrated as a highly promising and stable photocathode for solar hydrogen production. With platinum as prototypical cocatalyst, a photocurrent onset potential of 0.93 V vs RHE and saturation ph ...

American Chemical Society2013

Advanced method for electrical characterization of carrier-selective passivating contacts using transfer-length-method measurements under variable illumination

Christophe Ballif, Matthieu Despeisse, Sylvain Nicolay, Mathieu Gérard Boccard, Antoine Descoeudres, Gabriel Christmann, Bertrand Yves Paul Paviet-Salomon, Jonas Geissbühler, Laurie-Lou Senaud

2021