Mathieu Gérard Boccard

Cette personne n’est plus à l’EPFL

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Publications associées (80)

Bottom-Up and Top-Down Approaches for Identifying and Mitigating Electrical Losses in Silicon Heterojunction Solar Cells

Christophe Ballif, Mathieu Gérard Boccard, Luca Massimiliano Antognini

Electrical losses in silicon heterojunction (SHJ) solar cells are difficult to identify and to control as multiple material layers and several entangled physical phenomena are involved. In this context, this contribution aims to accurately investigate and ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Influence of the Dopant Gas Precursor in P-Type Nanocrystalline Silicon Layers on the Performance of Front Junction Heterojunction Solar Cells

Christophe Ballif, Quentin Thomas Jeangros, Mathieu Gérard Boccard, Laurie-Lou Senaud, Jan Haschke, Luca Massimiliano Antognini, Jean Cattin, Julie Amandine Dreon, Mario Joe Lehmann, Vincent Philippe Paratte

Silicon heterojunction solar cells can employ p-type hydrogenated nanocrystalline silicon nc-Si:H(p) on their front side, since these can provide better transparency and contact resistance compared to hydrogenated p-type amorphous silicon layers. We invest ...

2021

ZnSnxGe1-xN2 as electron-selective contact for silicon heterojunction solar cells

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

This work reports the electrical characterization of ZnSnxGe1-xN2 (ZTGN) layers deposited on glass by sputtering and further assesses for the first time the performance of SHJ solar cells featuring them as electron-selective contacts. Bandgap, conductivity ...

IEEE2021

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

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

2021

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, Luca Massimiliano Antognini, Jonathan Emanuel Thomet, Julien Hurni, Mathieu Gérard Boccard, Julie Amandine Dreon, Vincent Philippe Paratte, Davi Marcelo Fébba

2021

Temperature‐dependent performance of silicon heterojunction solar cells with transition‐metal‐oxide‐based selective contacts

Mathieu Gérard Boccard, Julie Amandine Dreon

The temperature coefficient (TC) is an essential figure of merit to accurately evaluate solar cell performance at various operating temperatures and hence enabling the comparison between different cell technologies. Recently, solar cells that use passivati ...

2021

Influence of Light Soaking on Silicon Heterojunction Solar Cells With Various Architectures

Christophe Ballif, Bertrand Yves Paul Paviet-Salomon, Matthieu Despeisse, Laurie-Lou Senaud, Mathieu Gérard Boccard, Jan Haschke, Jean Cattin

In this article, we investigate the effect of prolonged light exposure on silicon heterojunction solar cells. We show that, although light exposure systematically improves solar cell efficiency in the case of devices using intrinsic and p-type layers with ...

2021

Palliating the efficiency loss due to shunting in perovskite/silicon tandem solar cells through modifying the resistive properties of the recombination junction

Christophe Ballif, Gabriel Christmann, Mathieu Gérard Boccard, Sylvain Nicolay

As the efficiency of commercial crystalline silicon solar cells approaches its maximum theoretical value, tandem architectures are becoming increasingly popular to continue the push to higher photovoltaic performances. Thin-film materials are particularly ...

2021

Dopant-Free Bifacial Silicon Solar Cells

Christophe Ballif, Mathieu Gérard Boccard, Luca Massimiliano Antognini, Jean Cattin, Julie Amandine Dreon, Vincent Philippe Paratte, Sihua Zhong, Wenjie Lin, Hui Shen

Herein, challenges in the fabrication of full dopant-free bifacial silicon solar cells are discussed and efficient devices utilizing a MoO3/ indium tin oxide (ITO)/Ag hole-selective contact and ZnO/LiFx/Al electron-selective contacts with up to 79% short-c ...

2021

Effects of Work Function and Electron Affinity on the Performance of Carrier-Selective Contacts in Silicon Solar Cells Using ZnSnx Ge-1 (-) N-x(2) as a Case Study

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

This work reports the electrical characterization of ZnSnx Ge1 - xN2 (ZTGN) layers (10% < x < 90%) deposited on glass by combinatorial sputtering and further assesses the performance of silicon heterojunction (SHJ) solar cells featuring them as electron-se ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2021

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