Publication
Hole-Selective Front Contact Stack Enabling 24.1%-Efficient Silicon Heterojunction Solar Cells
Publications associées (32)
Contact Design for Silicon Heterojunction Solar Cells
Today more than ever the world needs clean energy sources and thus a fast deployment and scaling up of the photovoltaic industry. In this context improving solar cell efficiency plays a major role. In order to achieve the maximum single junction efficiency ...
EPFL2022Carrier-selective contacts using metal compounds for crystalline silicon solar cells
Mathieu Gérard Boccard, Julie Amandine Dreon
Solar cells rely on the efficient generation of electrons and holes and the subsequent collection of these photoexcited charge carriers at spatially separated electrodes. High wafer quality is now commonplace for crystalline silicon (c-Si) based solar cell ...
WILEY2022Electrical Losses Mitigation in Silicon Heterojunction Solar Cells
To overcome the worldwide challenges of climate change, photovoltaics is foreseen to play a significant role in the world electricity production. Nowadays, single junction crystalline silicon (c-Si) based solar cells hold the largest share of the global ph ...
EPFL2021Lateral transport in silicon solar cells
Christophe Ballif, Gabriel Christmann, Mathieu Gérard Boccard, Jan Haschke
We investigate lateral charge carrier transport in crystalline silicon solar cells. Under typical operation illumination of high-efficiency solar cells, a significant population of electrons and holes exist in the silicon wafer, leading to a non-negligible ...
AIP2020High-Efficiency Silicon Heterojunction Solar Cells: Materials, Devices and Applications
Mathieu Gérard Boccard, Yining Li
Photovoltaic (PV) technology offers an economic and sustainable solution to the challenge of increasing energy demand in times of global warming. The world PV market is currently dominated by the homo-junction crystalline silicon (c-Si) PV technology based ...
2020Optimization 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 ...
2020Evaluating Materials Design Parameters of Hole-Selective Contacts for Silicon Heterojunction Solar Cells
Christophe Ballif, Mathieu Gérard Boccard, Jan Haschke, Angela Nicole Fioretti, Rachel Emma Woods-Robinson
Silicon heterojunction (SHJ) solar cell efficiencies are limited by parasitic absorption from the hydrogenated amorphous silicon (a-Si:H) front contact, but this may be mitigated by selecting an alternative carrier selective contact material with a wider b ...
2020Impact of the Oxygen Content on the Optoelectronic Properties of the Indium-Tin-Oxide Based Transparent Electrodes for Silicon Heterojunction Solar Cells
Christophe Ballif, Mathieu Gérard Boccard, Jan Haschke, Jean Cattin, Brahim Aissa, Akshath Raghu Shetty
Amorphous/crystalline silicon heterojunction (SHJ) solar cells technology is attracting tremendous attention in recent years due to its potential to achieve high power conversion efficiencies at low fabrication temperatures and using few process steps. How ...
AMER INST PHYSICS2019Paths for maximal light incoupling and excellent electrical performances in silicon heterojunction solar cells
Christophe Ballif, Bertrand Yves Paul Paviet-Salomon, Laurie-Lou Senaud, Matthieu Despeisse, Mathieu Gérard Boccard, Monica Morales Masis, Jan Haschke, Luca Massimiliano Antognini, Jean Cattin, Oscar Esteban Rucavado Leandro, Raphaël Monnard, Julie Amandine Dreon, Vincent Philippe Paratte, Olivier Denis Dupré, Angela Nicole Fioretti, Sihua Zhong
We discuss here optical losses in silicon heterojunction solar cells and strategies to minimize them. Optical losses originate from most non-crystalline-silicon layers involved in the solar cell. A breakdown for typical values is shown evidencing that supp ...
IEEE2019Contact Resistivity of the p-Type Amorphous Silicon Hole Contact in Silicon Heterojunction Solar Cells
In silicon heterojunction solar cells made with high-lifetime wafers, resistive losses in the contacts dominate the total electrical power loss. Moreover, it is widely believed that the hole contact stack—a-Si:H(i)/a-Si:H(p)/ITO/Ag—is responsible for more ...
2019