Björn Niesen

Cette personne n’est plus à l’EPFL

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Publications associées (44)

Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells

Michael Graetzel, Wolfgang Richard Tress, Björn Niesen, Konrad Domanski, Pankaj Kumar Yadav, Mozhgan Yavari

2018

Correction: Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells (vol 11, pg 151, 2018)

Michael Graetzel, Wolfgang Richard Tress, Björn Niesen, Konrad Domanski, Pankaj Kumar Yadav, Mozhgan Yavari

2018

Charge Collection in Hybrid Perovskite Solar Cells: Relation to the Nanoscale Elemental Distribution

Christophe Ballif, Björn Niesen, Michael Elias Stückelberger, Jérémie Werner

Unveiling the correlation between elemental composition, Fermi-level splitting, and charge collection in perovskite solar cells (PSCs) when exposed to different environments is crucial to understanding the origin of defects. This will enable defect enginee ...

Ieee-Inst Electrical Electronics Engineers Inc2017

Improved Optics in Monolithic Perovskite/Silicon Tandem Solar Cells with a Nanocrystalline Silicon Recombination Junction

Christophe Ballif, Florent Sahli, Aïcha Hessler-Wyser, Matthias Wolfgang Bräuninger, Quentin Thomas Jeangros, Bertrand Yves Paul Paviet-Salomon, Matthieu Despeisse, Stefaan De Wolf, Sylvain Nicolay, Björn Niesen

Perovskite/silicon tandem solar cells are increasingly recognized as promi-sing candidates for next-generation photovoltaics with performance beyond the single-junction limit at potentially low production costs. Current designs for monolithic tandems rely ...

2017

Impact of organic overlayers on a-Si:H/c-Si surface potential

Christophe Ballif, Stefaan De Wolf, Andrea Tomasi, Björn Niesen, Johannes Peter Seif

Bilayers of intrinsic and doped hydrogenated amorphous silicon, deposited on crystalline silicon (c-Si) surfaces, simultaneously provide contact passivation and carrier collection in silicon heterojunction solar cells. Recently, we have shown that the pres ...

American Institute of Physics2017

The Role of Water in the Reversible Optoelectronic Degradation of Hybrid Perovskites at Low Pressure

Christophe Ballif, Björn Niesen, Michael Elias Stückelberger, Jérémie Werner

There is no doubt about the potential offered by the low-cost fabrication and high efficiency of hybrid organic inorganic perovskite solar cells. However, the service lifetimes of these devices must be increased from months to years to capitalize on their ...

American Chemical Society2017

Spectrally resolved nonlinearity and temperature dependence of perovskite solar cells

Christophe Ballif, Matthias Wolfgang Bräuninger, Florent Sahli, Björn Niesen, Jérémie Werner

An accurate electrical device characterization of hybrid organic-inorganic halide perovskite solar cells (PSCs) is an important prerequisite for further improvement and industrial transfer of this promising photovoltaic technology. In this work, we study t ...

Elsevier2017

Efficient Monolithic Perovskite/Perovskite Tandem Solar Cells

Christophe Ballif, Björn Niesen, Jérémie Werner

Efficient monolithic perovskite/perovskite tandem solar cells are fabricated using two perovskite absorbers with complementary bandgaps. By employing doped organic semiconductors, an efficient and selective extraction of the charge carriers is ensured. Thi ...

Wiley-VCH Verlag Berlin2017

Photocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradation

Christophe Ballif, Stefaan De Wolf, Jakub Holovsky, Björn Niesen, Martin Ledinsky, Jérémie Werner, Philipp Friedrich Hermann Löper, Martin Müller

Optical absorptance spectroscopy of polycrystalline CH3NH3PbI3 films usually indicates the presence of a PbI2 phase, either as a preparation residue or due to film degradation, but gives no insight on how this may affect electrical properties. Here, we app ...

Amer Chemical Soc2017

Perovskite/silicon tandem solar cells: marriage of convenience or true love story? - An overview

Christophe Ballif, Jérémie Werner, Björn Niesen

Perovskite/silicon tandem solar cells have reached efﬁciencies above 25% in just about three years of development, mostly driven by the rapid progress made in the perovskite solar cell research ﬁeld. This review aims to give an overview of the achievements ...

2017

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Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells

Michael Graetzel, Wolfgang Richard Tress, Björn Niesen, Konrad Domanski, Pankaj Kumar Yadav, Mozhgan Yavari

2018

Charge Collection in Hybrid Perovskite Solar Cells: Relation to the Nanoscale Elemental Distribution

Christophe Ballif, Björn Niesen, Michael Elias Stückelberger, Jérémie Werner

Ieee-Inst Electrical Electronics Engineers Inc2017

Improved Optics in Monolithic Perovskite/Silicon Tandem Solar Cells with a Nanocrystalline Silicon Recombination Junction

2017

Correction: Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells (vol 11, pg 151, 2018)

Michael Graetzel, Wolfgang Richard Tress, Björn Niesen, Konrad Domanski, Pankaj Kumar Yadav, Mozhgan Yavari

2018