Publications de Davide Sacchetto

Towards integrated photonic interposers for processing octave-spanning microresonator frequency combs

Davide Sacchetto, Michail Zervas, Michael Wolfgang Geiselmann

Microcombs-optical frequency combs generated in microresonators-have advanced tremendously in the past decade, and are advantageous for applications in frequency metrology, navigation, spectroscopy, telecommunications, and microwave photonics. Crucially, m ...

SPRINGERNATURE2021

Integrated Photonic Interposers for Processing Octave-Spanning Microresonator Frequency Combs

Davide Sacchetto, Michail Zervas, Michael Wolfgang Geiselmann

We demonstrate multiple silicon-nitride nanophotonic elements for on-chip processing of octave-spanning microresonator frequency combs. Dichroic filters, multimode interferometers, and tunable add-drop microring filters are shown along with soliton microco ...

IEEE2020

Fully textured monolithic perovskite/silicon tandem solar cells with 25.2% power conversion efficiency

Christophe Ballif, Florent Sahli, Quentin Thomas Jeangros, Matthias Wolfgang Bräuninger, Davide Sacchetto, Bertrand Yves Paul Paviet-Salomon, Gianluca Cattaneo, Matthieu Despeisse, Mathieu Gérard Boccard, Sylvain Nicolay

Tandem devices combining perovskite and silicon solar cells are promising candidates to achieve power conversion efficiencies above 30% at reasonable costs. State-of-the-art monolithic two-terminal perovskite/silicon tandem devices have so far featured sil ...

2018

Monolithic Fabrication of Silicon Nanowires Bridging Thick Silicon Structures

Davide Sacchetto, Yusuf Leblebici, Oliver Peric, Zuhal Tasdemir

A monolithic process is developed for the fabrication of Si nanowires within thick Si substrates. A combination of anisotropic etch and sidewall passivation is utilized to protect and release Si lines during the subsequent deep etch. An etch depth of 10 mu ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2018

Hybrid sequential deposition process for fully textured perovskite/silicon tandem solar cells

Christophe Ballif, Quentin Thomas Jeangros, Davide Sacchetto, Bertrand Yves Paul Paviet-Salomon, Florent Sahli, Arnaud Walter, Gianluca Cattaneo, Matthieu Despeisse, Mathieu Gérard Boccard, Sylvain Nicolay

Tandem solar cells that feature a high-bandgap perovskite cell on top of a lower bandgap silicon cell have the potential to reach efficiencies > 30%. Here, we present a versatile hybrid deposition method that yields conformal perovskite cells directly on t ...

IEEE2018

Control of Resistive Switching in Mott Memories Based on TiN/AM4Q8/TiN MIM Devices

Giovanni De Micheli, Davide Sacchetto, Jury Sandrini, Pierre-Emmanuel Julien Marc Gaillardon

The family of AM4Q8 chalcogenide Mott insulators gained attention in recent years for its application opportunities. Here, we explore and validate the resistive switching mechanism of thin-film of GaV4S8 sandwich ...

Electrochemical Society2017

ITO/MoOx/a-Si:H(i) Hole-Selective Contacts for Silicon Heterojunction Solar Cells: Degradation Mechanisms and Cell Integration

Christophe Ballif, Davide Sacchetto, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Antoine Descoeudres, Gabriel Christmann, Jonas Geissbühler, Matthieu Despeisse, Sylvain Nicolay, Loris Barraud

Molybdenum oxide is an efficient hole collector for silicon solar cells. However, its optoelectronic properties deteriorate during cell manufacturing. To assess this issue, the optoelectronic properties and microstructure of molybdenum oxide-based hole con ...

2017

Progression towards high efficiency perovskite solar cells via optimisation of the front electrode and blocking layer

Christophe Ballif, Arnaud Walter, Davide Sacchetto, Sylvain Nicolay, Matthias Wolfgang Bräuninger, Björn Niesen, Soo-Jin Moon

The effects of a fluorine doped tin oxide (FTO) electrode, titanium dioxide (TiO2-x) blocking layer (BL) and perovskite (methyl ammonium lead triiodide) preparation on the overall properties of the photovoltaic cells have been studied. The FTO electrode wa ...

Royal Society of Chemistry2016

Efficient Near-Infrared-Transparent Perovskite Solar Cells Enabling Direct Comparison of 4-Terminal and Monolithic Perovskite/Silicon Tandem Cells

Christophe Ballif, Davide Sacchetto, Florent Sahli, Arnaud Walter, Nicolas Tétreault, Matthieu Despeisse, Bertrand Yves Paul Paviet-Salomon, Sylvain Nicolay, Matthias Wolfgang Bräuninger, Stefaan De Wolf

Combining market-proven silicon solar cell technology with an efficient wide band gap top cell into a tandem device is an attractive approach to reduce the cost of photovoltaic systems. For this, perovskite solar cells are promising high-efficiency top cel ...

Amer Chemical Soc2016

Zinc tin oxide as high-temperature stable recombination layer for mesoscopic perovskite/silicon monolithic tandem solar cells

Christophe Ballif, Davide Sacchetto, Xavier Niquille, Arnaud Walter, Stefaan De Wolf, Sylvain Nicolay, Oscar Esteban Rucavado Leandro, Björn Niesen, Monica Morales Masis, Soo-Jin Moon

Perovskite/crystalline silicon tandem solar cells have the potential to reach efficiencies beyond those of silicon single-junction record devices. However, the high-temperature process of 500 °C needed for state-of-the-art mesoscopic perovskite cells has, ...

American Institute of Physics2016