J
Jonas Geissbühler
Researcher at École Polytechnique Fédérale de Lausanne
Publications - 32
Citations - 1665
Jonas Geissbühler is an academic researcher from École Polytechnique Fédérale de Lausanne. The author has contributed to research in topics: Amorphous silicon & Crystalline silicon. The author has an hindex of 15, co-authored 31 publications receiving 1352 citations.
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Journal ArticleDOI
Efficient silicon solar cells with dopant-free asymmetric heterocontacts
James Bullock,Mark Hettick,Mark Hettick,Jonas Geissbühler,Alison J. Ong,Alison J. Ong,Thomas Allen,Carolin M. Sutter-Fella,Carolin M. Sutter-Fella,Teresa Chen,Hiroki Ota,Hiroki Ota,Ethan W. Schaler,Stefaan De Wolf,Christophe Ballif,Andres Cuevas,Ali Javey,Ali Javey +17 more
TL;DR: In this paper, the dopant-free electron and hole carrier-selective heterocontacts using alkali metal fluorides and metal oxides, respectively, in combination with passivating intrinsic amorphous silicon interlayers, were successfully developed and implemented.
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22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector
Jonas Geissbühler,Jérémie Werner,Silvia Martin de Nicolas,Loris Barraud,Aïcha Hessler-Wyser,Matthieu Despeisse,Sylvain Nicolay,Andrea Tomasi,Bjoern Niesen,Stefaan De Wolf,Christophe Ballif +10 more
TL;DR: In this article, the authors demonstrate a silicon heterojunction solar cell with molybdenum oxide hole collector, featuring a fill factor value higher than 80% and certified energy conversion efficiency of 22.5%.
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Silicon Heterojunction Solar Cells With Copper-Plated Grid Electrodes: Status and Comparison With Silver Thick-Film Techniques
Jonas Geissbühler,Stefaan De Wolf,Antonin Faes,Nicolas Badel,Quentin Jeangros,Andrea Tomasi,Loris Barraud,Antoine Descoeudres,Matthieu Despeisse,Christophe Ballif +9 more
TL;DR: In this paper, the inner structure of copper-plated fingers and their interfaces was investigated and compared with common silver printing techniques for the front metallization of silicon heterojunction solar cells.
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Amorphous/crystalline silicon interface defects induced by hydrogen plasma treatments
Jonas Geissbühler,Stefaan De Wolf,Bénédicte Demaurex,Johannes P. Seif,Duncan T. L. Alexander,Loris Barraud,Christophe Ballif +6 more
TL;DR: In this paper, the defect creation induced by hydrogen-plasmas was investigated and it was shown that a severe drop in interface-passivation quality is observed when films are etched to a thickness of less than 8'nm.
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Back-Contacted Silicon Heterojunction Solar Cells With Efficiency >21%
Andrea Tomasi,Bertrand Paviet-Salomon,D. Lachenal,Silvia Martin de Nicolas,Antoine Descoeudres,Jonas Geissbühler,Stefaan De Wolf,Christophe Ballif +7 more
TL;DR: In this paper, the authors report on the fabrication of back-contacted silicon heterojunction solar cells with conversion efficiencies above 21% using simple and size-scalable patterning methods.