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Hard and Transparent DLC Coating as a Protective Layer for Solar Cells
A. Dehbi-Alaoui, B. Sequaq, A. Obaidi, M.A. Ibba
Solar Cell, DLC Films, Protection, Coating, Optical Properties, Transparent
New Materials and Concepts for Photovoltaic Devices
Subtopic: New Materials and Concepts for Cells and Modules
Event: 33rd European Photovoltaic Solar Energy Conference and Exhibition
Session: 1CV.3.97
195 - 197
ISBN: 3-936338-47-7
Paper DOI: 10.4229/EUPVSEC20172017-1CV.3.97
0,00 EUR
Document(s): paper, poster


Solar cells are subject to sand wind, they need a hard and transparent layer on the front surface. Diamondlike carbon films (DLC) coatings are known for their high hardness but they are not completely transparent in the visible. In this work we will show a method, using a Fast Atom Beam (FAB) source, in a special configuration that allowed us to deposit hard and transparent (clear) 100nm DLC films on glass substrates at room temperature and at pressure around 10-2 Pa. The coating is deposited from the reflected FAB beam from an Aluminum target which was not sputtered. The energy of the reflected FAB beam particles has been reduced due to collisions with the reflected particles from the substrates. Infrared spectroscopy showed that these films are not hydrogenated this is logical because only Argon was used to sputter carbon from the internal FAB source graphite walls and were accelerated out of the FAB source. Physical properties have been measured using different characterization techniques. The results showed that this coating is a tetrahedral (ta-C) type of DLC film and can be used as a protective layer for photovoltaique solar cells.