Title:	The EU Project R2M-Si on Roll to Module Processed Crystalline Silicon Thin-Films
Author(s):	S. Lindekugel, B. Terheiden, R. Pavlovic, K. Van Nieuwenhuysen, T. Pettersen, E. Astrova, A. Straboni, H.H. Kühnlein, S. Reber
Keywords:	Porous Silicon, Solar Cell, c-Si Thin Films, Lift-Off
Topic:	THIN FILM SOLAR CELLS
Subtopic:	Silicon-based Thin Film Solar Cells
Event:	29th European Photovoltaic Solar Energy Conference and Exhibition
Session:	3CV.1.31
Pages:	1673 - 1677
ISBN:	3-936338-34-5
Paper DOI:	10.4229/EUPVSEC20142014-3CV.1.31
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

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This paper presents a summary of the EU project “roll to module processed crystalline silicon thinfilms” (R2M-Si). The aim of this project was to lift off c-Si-thin-films in a cost effective manner, and to process them to integrated interconnected solar cells. One major goal was therefore to provide Si foil material for solar cells with a high efficiency potential. Within the R2M-Si project both the theoretical understanding and the actual process development of porosifying and detaching layers from flat wafers as well as from the circumference of a silicon rod have been investigated. Studies on crystal orientation dependence of the porosification along with tool development towards a continuous formation of a separation layer were accompanied by in depth understanding and thus optimization of the reorganization and subsequent epitaxial growth process. Finally the introduction of a special attachment process and an integrated solar cell concept could be achieved.