Berlin 2015 – scientific programme
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AKE: Arbeitskreis Energie
AKE 1: Photovoltaics
AKE 1.1: Invited Talk
Monday, March 16, 2015, 09:30–10:00, A 151
Perspectives and challenges of thin-film crystalline silicon solar cells on glass — •Bernd Rech1, Daniel Amkreutz1, Jan Haschke1, Stefan Gall1, Christiane Becker2, Onno Gabriel3, and Rutger Schlatmann3 — 1Institut Silizium Photovoltaik, Helmholtz-Zentrum Berlin, 12489 Berlin, Germany — 2Nachwuchsgruppe Nano-Sippe, Helmholtz-Zentrum Berlin, 12489 Berlin — 3PVcomB, Helmholtz-Zentrum Berlin, 12489 Berlin, Germany
Silicon is an abundant, non-toxic material which has evolved to be the dominating raw material for photovoltaic PV devices today. The world-wide market share of solar cells based on multi- or monocrystalline silicon wafers exceeds 80% in a strongly growing market. However, the high energy demand and costs for the production of silicon wafers gave rise to other silicon solar cell technologies aiming at high conversion efficiencies while using much less high quality crystalline silicon. Only recently, the liquid phase crystallization (LPC) of amorphous or nanocrystalline silicon thin-films directly on a glass substrate has received increased attention for photovoltaics. By using an electron-beam line source or a line shaped laser moving across the substrate the entire silicon precursor film is molten and subsequently recrystallizes. We will present our latest progress in fabricating high quality crystalline silicon thin film solar cells on glass highlighted by efficiencies of 12 % and open-circuit voltages Voc well above 600 mV with a maximum value of 656 mV. So far, such high Voc values have only been achieved on wafer-based silicon solar cells.