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Roll-to-Roll Printed Solar Cells: Up-Scaling from Laboratory to Megawatts of Production
D. Jackrel, B. Cardozo, F. Jacob, G. Brown, P. Stone, J. Woodruff, G. Kimball, P. Jeffries, W. Zhang, V. Faifer, J. Krawczyk
CuInSe2, Simulation, Nanoparticle, Experimental Methods, Solar Cell Efficiency
Thin Film Solar Cells
Subtopic: CdTe, CIS and Related Ternary and Quaternary Thin Film Solar Cells
Event: 27th European Photovoltaic Solar Energy Conference and Exhibition
Session: 3DO.13.2
2249 - 2253
ISBN: 3-936338-28-0
Paper DOI: 10.4229/27thEUPVSEC2012-3DO.13.2
0,00 EUR
Document(s): paper


Thin film photovoltaics (PV) offer the prospect of being significantly lower cost than traditional silicon panels at competitive efficiencies. Some of the most promising absorber materials being commercialized are CuInSe2-based (CIGS) due to demonstrated laboratory efficiencies over 20% [1, 2]. However, production module efficiencies are typically considerably lower than the best laboratory results. Nanosolar CIGS solar cells are produced using a low-cost non-vacuum printing method on flexible foil. This paper describes the practices that have been developed at Nanosolar to transfer laboratory processes to MW-scale manufacturing processes, at nearequivalent efficiencies. This has been accomplished by 1) developing laboratory equipment and processes that can predictably mimic manufacturing processes, 2) utilizing statistically valid experimental methods of optimization in the lab and manufacturing lines, and 3) establishing a deep fundamental understanding of the technology to aid in transferring concepts rather than rote recipes. We compare laboratory and manufacturing line efficiency distributions for different generations of Nanosolar cells and discuss the methodology which allows for efficient transfer of laboratory breakthroughs into mass production.