Franz-Josef Haug

Publications associées (113)

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Implementation and understanding of p plus fired rear hole selective tunnel oxide passivating contacts enabling > 22% conversion efficiency in p-type c-Si solar cells

Christophe Ballif, Franz-Josef Haug, Andrea Ingenito, Sofia Libraro, Matthieu Despeisse, Sylvain Nicolay, Philippe Wyss

Passivating contacts are key enablers for high efficiency c-Si solar cells. Here, we present our latest advancement in terms of implementation and understanding in fired passivating contacts (FPC) used as rear p + passivating contact in p-type solar cells. ...

ELSEVIER2021

Passivating Polysilicon Recombination Junctions for Crystalline Silicon Solar Cells

Christophe Ballif, Franz-Josef Haug, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Andrea Ingenito, Audrey Marie Isabelle Morisset, Philippe Wyss, Mario Joe Lehmann

Polysilicon recombination junctions whose n-type bottom layers double as a passivating contact to the silicon surface are investigated. Such recombination junctions are a key element in the interconnection of tandem devices with a silicon bottom cell, and ...

2021

Quantification of hydrogen in nanostructured hydrogenated passivating contacts for silicon photovoltaics combining SIMS-APT-TEM: A multiscale correlative approach

Franz-Josef Haug, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Mario Joe Lehmann

Multiscale characterization of the hydrogenation process of silicon solar cell contacts based on c-Si/SiOx/ncSiCx(p) has been performed by combining dynamic secondary ion mass-spectrometry (D-SIMS), atom probe tomography (APT), and transmission electron mi ...

ELSEVIER2021

A recalculation of the efficiency limit in crystalline Si/Si tandem solar cells

Christophe Ballif, Franz-Josef Haug

We determine the limiting efficiency for monolithic tandem solar cells that employ crystalline silicon for the top-cell as well as for the bottom cell. In such a design, the top-cell extends over the region of very high generation rate that forms at the fr ...

2021

A round Robin-Highliting on the passivating contact technology

Franz-Josef Haug, Andrea Ingenito, Audrey Marie Isabelle Morisset, Aditya Chaudhary

The aim of this work is to demonstrate the maturity of the TOPCon technology by conducting a round-robin on symmetrically processed lifetime samples in the leading European PV institutes EPFL, ISC, CEA-INES, ISFH, IMEC and Fraunhofer ISE within the H2020 f ...

EDP SCIENCES S A2021

Towards Quantitative Interpretation of Fourier-Transform Photocurrent Spectroscopy on Thin-Film Solar Cells

Franz-Josef Haug, Michael Elias Stückelberger, Jakub Holovsky, Martin Müller

The method of detecting deep defects in photovoltaic materials by Fourier-Transform Photocurrent Spectroscopy has gone through continuous development during the last two decades. Still, giving quantitative predictions of photovoltaic device performance is ...

2020

Optimization of front SiNx/ITO stacks for high-efficiency two-side contacted c-Si solar cells with co-annealed front and rear passivating contacts

Christophe Ballif, Franz-Josef Haug, Xavier Niquille, Andrea Ingenito, Sylvain Nicolay, Frank Meyer

In this contribution, we present an electron selective passivating contact metallised with a low temperature process to target front side applications in crystalline silicon (c-Si) solar cells. In addition to an interfacial silicon oxide (SiOx) and an in-s ...

2020

A Mixed-Phase SiOx Hole Selective Junction Compatible With High Temperatures Used in Industrial Solar Cell Manufacturing

Christophe Ballif, Franz-Josef Haug, Quentin Thomas Jeangros, Xavier Niquille, Andrea Ingenito, Philippe Wyss, Matthieu Despeisse, Mario Joe Lehmann, Gizem Nogay, Josua Andreas Stückelberger

We present a p-type passivating rear contact that complies with integration into standard solar cell manufacturing with phosphorus-diffused front side. Our contact structure consists of a thin SiOx tunneling layer grown by wet chemistry and a stack of laye ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

25.1%-Efficient Monolithic Perovskite/Silicon Tandem Solar Cell Based on a p-type Monocrystalline Textured Silicon Wafer and High-Temperature Passivating Contacts

Christophe Ballif, Franz-Josef Haug, Quentin Thomas Jeangros, Andrea Ingenito, Florent Sahli, Matthieu Despeisse, Mathieu Gérard Boccard, Jérémie Werner, Gizem Nogay

2019

A method for quantitative nanoscale imaging of dopant distributions using secondary ion mass spectrometry: an application example in silicon photovoltaics

Franz-Josef Haug, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Andrea Ingenito, Gizem Nogay, Mario Joe Lehmann

A method for rapid quantitative imaging of dopant distribution using secondary ion mass spectrometry (SIMS) is described. The method is based on SIMS imaging of the cross-section of a reference sample with a known concentration profile. It is demonstrated ...

2019

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