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Franz-Josef Haug

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Interplay of annealing temperature and doping in hole selective rear contacts based on silicon-rich silicon-carbide thin films

Christophe Ballif, Gizem Nogay, Franz-Josef Haug, Matthieu Despeisse, Monica Morales Masis, Philipp Friedrich Hermann Löper, Philippe Wyss, Oscar Esteban Rucavado Leandro, Josua Andreas Stückelberger

We present a detailed optimization of a hole selective rear contact for p-type crystalline silicon solar cells which relies on full-area processes and provides full-area passivation. The passivating hole-contact is based on a layer stack comprising a chemi ...

Elsevier Science Bv2017

Increasing the efficiency of silicon heterojunction solar cells and modules by light soaking

Christophe Ballif, Franz-Josef Haug, Antoine Descoeudres, Jacques Levrat, Matthieu Despeisse, Stefaan De Wolf, Eiji Kobayashi

Silicon heterojunction solar cells use crystalline silicon (c-Si) wafers as optical absorbers and employ bilayers of doped/intrinsic hydrogenated amorphous silicon (a-Si:H) to form passivating contacts. Recently, we demonstrated that such solar cells incre ...

Elsevier Science Bv2017

Fourier light scattering model for treating textures deeper than the wavelength

Christophe Ballif, Franz-Josef Haug, Matthias Wolfgang Bräuninger

We apply a Fourier-scattering model to describe light scattering in solar cells with textured surfaces. For the size and inclination angle of typical micro-textures, scattering may occur into large angles. This makes the model prone to paraxial errors. We ...

Optical Society of America2017

Solar photovoltaic module

Christophe Ballif, Franz-Josef Haug, Philipp Friedrich Hermann Löper, Philippe Wyss, Josua Andreas Stückelberger

In the present invention a new solar photovoltaic module is proposed comprising a solar cell comprising a silicon layer having a first (1 a) surface and a second surface (1a) opposite to said first surface. The solar cell further comprises a passivating la ...

2017

Editorial for 'special issue on advanced solar cell technology'

Franz-Josef Haug

IOP Publishing Ltd2017

Review: Progress in solar cells from hydrogenated amorphous silicon

Christophe Ballif, Franz-Josef Haug, Michael Elias Stückelberger, Rémi Biron

Hydrogenated amorphous silicon (alpha-Si:H) has been used for decades doped and as intrinsic absorber layers in thin-film silicon solar cells. Whereas their effiency was improved for a long time by the deposition of higher quality absorber layers, recent i ...

Elsevier2017

From randomly self-textured substrates to highly efficient thin film solar cells: Influence of geometric interface engineering on light trapping, plasmonic losses and charge extraction

Christophe Ballif, Franz-Josef Haug, Etienne Antoine Julien Moulin

An approach that models the fabrication and enables the characterization of randomly self-textured silicon thin film solar cells is developed and are compared to experimental results. The optical and electrical properties of the solar cells depend on the m ...

Elsevier2017

Optical Evaluation of the Rear Contacts of Crystalline Silicon Solar Cells by Coupled Electromagnetic and Statistical Ray-Optics Modeling

Christophe Ballif, Franz-Josef Haug, Ali Dabirian, Stefaan De Wolf, Monica Morales Masis

High-efficiency crystalline silicon (c-Si) solar cells increasingly feature sophisticated electron and hole contacts aimed at minimizing electronic losses. At the rear of photovoltaic devices, such contacts-usually consisting of stacks of functional layers ...

Ieee-Inst Electrical Electronics Engineers Inc2017

Comparison of LPCVD and sputter-etched ZnO layers applied as front electrodes in tandem thin-film silicon solar cells

Christophe Ballif, Franz-Josef Haug, Grégory Bugnon, Michael Elias Stückelberger, Etienne Antoine Julien Moulin

Aluminum-doped zinc oxide (ZnO:Al) layers deposited by sputtering and boron-doped zinc oxide (ZnO:B) layers deposited by low-pressure chemical vapor deposition (LPCVD) are well-established materials for front electrodes in thin-film silicon solar cells. In ...

Elsevier2016

Design of periodic nano- and macro-scale textures for high-performance thin-film multi-junction solar cells

Christophe Ballif, Franz-Josef Haug, Etienne Antoine Julien Moulin

Surface textures in thin-film silicon multi-junction solar cells play an important role in gaining the photocurrent of the devices. In this paper, a design of the textures is carried out for the case of amorphous silicon/micro-crystalline silicon (a-Si:H/m ...

Iop Publishing Ltd2016

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Interplay of annealing temperature and doping in hole selective rear contacts based on silicon-rich silicon-carbide thin films

Elsevier Science Bv2017

From randomly self-textured substrates to highly efficient thin film solar cells: Influence of geometric interface engineering on light trapping, plasmonic losses and charge extraction

Christophe Ballif, Franz-Josef Haug, Etienne Antoine Julien Moulin

Elsevier2017

Comparison of LPCVD and sputter-etched ZnO layers applied as front electrodes in tandem thin-film silicon solar cells

Christophe Ballif, Franz-Josef Haug, Grégory Bugnon, Michael Elias Stückelberger, Etienne Antoine Julien Moulin

Elsevier2016

Design of periodic nano- and macro-scale textures for high-performance thin-film multi-junction solar cells

Christophe Ballif, Franz-Josef Haug, Etienne Antoine Julien Moulin

Iop Publishing Ltd2016

Optical Evaluation of the Rear Contacts of Crystalline Silicon Solar Cells by Coupled Electromagnetic and Statistical Ray-Optics Modeling

Christophe Ballif, Franz-Josef Haug, Ali Dabirian, Stefaan De Wolf, Monica Morales Masis

Ieee-Inst Electrical Electronics Engineers Inc2017