Publications de Yannick Samuel Riesen

The impact of silicon solar cell architecture and cell interconnection on energy yield in hot & sunny climates

Christophe Ballif, Jacques Levrat, Matthieu Despeisse, Jan Haschke, Stefaan De Wolf, Jean Cattin, Andrea Tomasi, Johannes Peter Seif, Yannick Samuel Riesen, Brahim Aissa

Extensive knowledge of the dependence of solar cell and module performance on temperature and irradiance is essential for their optimal application in the field. Here we study such dependencies in the most common high-efficiency silicon solar cell architec ...

Royal Soc Chemistry2017

Control algorithm for a residential photovoltaic system with storage

Christophe Ballif, Nicolas Würsch, Yannick Samuel Riesen

High penetration of photovoltaic (PV) electricity could affect the stability of the low-voltage grid due to over-voltage and transformer overloading at times of peak production. Residential battery storage can smooth out those peaks and hence contribute to ...

Elsevier Sci Ltd2017

Temperature dependence of hydrogenated amorphous silicon solar cell performances

Christophe Ballif, Franz-Josef Haug, Michael Elias Stückelberger, Yannick Samuel Riesen

Thin-film hydrogenated amorphous silicon solar (a-Si:H) cells are known to have better temperature coefficients than crystalline silicon cells. To investigate whether a-Si:H cells that are optimized for standard conditions (STC) also have the highest energ ...

American Institute of Physics2016

Comparison of amorphous silicon absorber materials: Kinetics of light-induced degradation

Christophe Ballif, Franz-Josef Haug, Matthieu Despeisse, Mathieu Gérard Boccard, Michael Elias Stückelberger, Yannick Samuel Riesen, Adrian Billet

We investigate the influence of the deposition parameters for intrinsic amorphous silicon absorber layers on light-induced degradation (LID) of thin-film silicon solar cells. The focus is on absorber layers with different bandgaps: on one side, solar cells ...

Wiley-Blackwell2016

Energy Yield and Electricity Management of Thin-Film and Crystalline Silicon Solar Cells : from Devices to Systems

Yannick Samuel Riesen

In the case of high photovoltaic (PV) penetration into the electricity grid, the energy produced by a PV system that is effectively used (useful energy) depends on the energy yield and on how this energy is managed to avoid detrimental effects occurring at ...

EPFL2016

Nanocrystalline Silicon Carrier Collectors for Silicon Heterojunction Solar Cells and Impact on Low-Temperature Device Characteristics

Christophe Ballif, Franz-Josef Haug, Quentin Thomas Jeangros, Nicolas Würsch, Stefaan De Wolf, Gizem Nogay, Johannes Peter Seif, Yannick Samuel Riesen, Andrea Tomasi

Silicon heterojunction solar cells typically use stacks of hydrogenated intrinsic/doped amorphous silicon layers as carrier selective contacts. However, the use of these layers may cause parasitic optical absorption losses and moderate fill factor (FF) val ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Demand Side Management for Enhanced Integration of Photovoltaics into Grid

Christophe Ballif, Yannick Samuel Riesen, Raffael Fabian Tschui, Christophe Germain Boillat

Demand side management could be a very effective way to shift electric consumption of households to the maximum production hours of photovoltaic (PV) systems. A field study on more than 100 households were performed to evaluate the share of electric consum ...

WIP Wirtschaft und Infrastruktur GmbH & Co Planungs KG2015

Light-induced Voc increase and decrease in high-efficiency amorphous silicon solar cells

Christophe Ballif, Franz-Josef Haug, Jan-Willem Alexander Schüttauf, Matthieu Despeisse, Michael Elias Stückelberger, Yannick Samuel Riesen

High-efficiency amorphous silicon (a-Si:H) solar cells were deposited with different thicknesses of the p-type amorphous silicon carbide layer on substrates of varying roughness. We observed a light-induced open-circuit voltage (Voc) increase upon light so ...

American Institute of Physics2014

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

Amorphous silicon based betavoltaic devices

Christophe Ballif, Sylvain Dunand, Yannick Samuel Riesen, Andrea Franco

Hydrogenated amorphous silicon betavoltaic devices are studied both by simulation and experimentally. Devices exhibiting a power density of 0.1 μW/cm2 upon Tritium exposure were fabricated. However, a significant degradation of the performance is taking pl ...

2013