Programm Photovoltaik Ausgabe 2009 ... - Bundesamt für Energie BFE

Figure 2: SEM picture of laser-ablated P2 patterning line (selective removal of CIGS layer prior to
TCO-deposition) on finished module. Total line width is about 25 micron (Left). SEM picture of laserablated
P3 patterning line (selective removal of top TCO layer) on finished module. Total scribe width
is about 30 micron (right).
Figure 3: a prototype of monolithically inter-connected CIGS module on polymer film.
National / international collaborations
The project is carried out in collaboration with the Institute of applied laser technology at the Berner
Fachhochschule für Technik und Informatik, as well as Flisom AG. Flisom is a spin-off from ETH Zurich.
Additional specific know-how is required and is acquired through subcontracting and collaboration
with Swiss and European industries.
Evaluation of 2008 and perspectives for 2009
The project objectives for 2008 have been reached, namely the identification of process parameters
for monolithic module integration on polymer foil by laser-ablation and their characterisation concerning
the influence of scribe properties on module performance. This led to manufacturing of module
prototypes and the possibility of their analysis.
The focus of the future project work will be the increase in processing speed, the improvement of
module performance (also in view of the homogeneity of layers over larger surfaces) as well as the
elaboration of concepts for automated scribing system for use in mass-production.
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Laser patterning of Cu(In,Ga)Se2 solar cells on flexible foils for monolithic integration, A. N. Tiwari, ETHZ
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