Publications de Maximilien Joseph Marie Bonnet-Eymard

Amorphous silicon-germanium for triple and quadruple junction thin-film silicon based solar cells

Christophe Ballif, Franz-Josef Haug, Matthieu Despeisse, Mathieu Gérard Boccard, Grégory Bugnon, Björn Niesen, Michael Elias Stückelberger, Maximilien Joseph Marie Bonnet-Eymard

We study amorphous silicon-germanium (a-SiGe:H) as intrinsic absorber material for thin-film silicon-based triple and quadruple junction solar cells. First, we present the development of a-SiGe:H single junction devices, in particular the Ge-content gradin ...

Elsevier2015

High-Stable-Efficiency Tandem Thin-Film Silicon Solar Cell With Low-Refractive-Index Silicon-Oxide Interlayer

Christophe Ballif, Xavier Niquille, Jordi Escarre Palou, Matthieu Despeisse, Mathieu Gérard Boccard, Grégory Bugnon, Maximilien Joseph Marie Bonnet-Eymard

We report the recent advances and key requirements for high-efficiency "micromorph" tandem thin-film silicon solar cells composed of an amorphous silicon top cell and a microcrystalline silicon bottom cell. The impact of inserting a low-refractive-index si ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Class AAA LED-Based Solar Simulator for Steady-State Measurements and Light Soaking

Christophe Ballif, Franz-Josef Haug, Matthieu Despeisse, Michael Elias Stückelberger, Yannick Samuel Riesen, Maximilien Joseph Marie Bonnet-Eymard, Brice Perruche

Recent improvements in light-emitting diode (LED) technology has allowed for the use of LEDs for solar simulators with excellent characteristics. In this paper, we present a solar simulator prototype fully based on LEDs. Our prototype has been designed spe ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Optimized short-circuit current mismatch in multi-junction solar cells

Christophe Ballif, Matthieu Despeisse, Mathieu Gérard Boccard, Grégory Bugnon, Fanny Sculati-Meillaud, Maximilien Joseph Marie Bonnet-Eymard

Multi-junction photovoltaic devices include two or more component sub-cells which are electrically interconnected in series. At any power point, the current output of the total device is limited by the sub-cell with the smallest current density. Therefore, ...

Elsevier2013

Measurement of the Open-Circuit Voltage of Individual Subcells in a Dual-Junction Solar Cell

Christophe Ballif, Matthieu Despeisse, Grégory Bugnon, Jakub Holovsky, Peter Cuony, Maximilien Joseph Marie Bonnet-Eymard

Dual-junction solar cells have the potential for higher conversion efficiencies than single junctions, thanks to a better utilization of the solar spectrum. However, their optimization is more complex because the monolithic interconnection makes the indivi ...

2012

Variable light biasing method to measure component I–V characteristics of multi-junction solar cells

Christophe Ballif, Matthieu Despeisse, Mathieu Gérard Boccard, Jakub Holovsky, Maximilien Joseph Marie Bonnet-Eymard

We presentanewtechniquetomeasurecomponentcurrent–voltage(I–V) curvesofindividual sub-cellsintegratedinamonolithicmulti-junctionsolarcell.Thisnewapproach,comparedtoall previouslyreportedones,iswellsuitedforthin-filmsiliconp–i–nstructureswheretheso-called sh ...

Elsevier2012

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Maximilien Joseph Marie Bonnet-Eymard