11-04 :: April/May 2011
nanotimes News in Brief
Large-format screen-printed metallized p-type silicon MWT- PERC solar cell with 20.2% efficiency – manufactured at the PV-TEC Fraunhofer ISE. © Image & Text: Fraunhofer ISE
n-type silicon wafer with four BC-BJ solar cells featuring screen-printed contacts and Al-alloyed emitter reaching efficiencies up to 20.0%, manufactured at PV-TEC Fraunhofer ISE. © Fraunhofer ISE
and an enormous cost saving potential. For this solar cell concept, both the metallization with Al-alloyed emitter as well as the structuring steps are carried out exclusively with screen-printing technology. “For us, it is especially relevant that the Al-alloyed emitter has such a high potential. We still see many possibilities here to further increase the efficiency,” says Robert Woehl, Ph.D. student at Fraunhofer ISE.
Both types of solar cells were produced using the in- dustry-level equipment available at PV-TEC. The cell efficiencies were confirmed by the certified solar cell calibration laboratory CalLab PV Cells. “With these results, an important milestone in cost savings has been reached. Remarkably high solar cell efficiencies of over 20% have been achieved using the establis-
hed industry-level production technology,” states Dr. Ralf Preu, Division Director of PV Production Tech- nology and Quality Assurance and Chief Manager of PV-TEC. “The public funding received from the federal government and the European Union toge- ther with our close cooperation with manufacturers of solar cells, production systems and materials have enabled this path-breaking success.”
Contact: Dr. Ralf Preu, Project Leader, Phone: +49 (0) 7 61/45 88-52 60; Dr Ing. Daniel Biro, Phone: +49 (0) 7 61 / 45 88-52 46 http://www.ise.fraunhofer.de