The Path to Industrial Production of Highly Efficient Metal Wrap Through Silicon Solar Cells
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Thaidigsmann Benjamin
Benjamin Thaidigsmann studied physics in Tübingen, Germany, and finished his diploma thesis on quantum efficiency analysis of crystalline silicon solar cells in 2009 at Fraunhofer ISE. Benjamin then started his Ph.D. dissertation with Fraunhofer ISE, focusing on the development and characterization of highly efficient metal wrap through silicon solar cells with surface passivation.
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Linse Michael
Michael Linse studied printing and media technologies at Stuttgart Media University and finished his bachelor thesis on advanced screen and stencil printing technologies for crystalline silicon collar cells in 2010 at Fraunhofer ISE. Since then Michael has been working as a process engineer in the MWT Solar Cells and Printing Technology group at Fraunhofer ISE.
Andreas Wolf is head of the Thermal Processes and Passivated Solar Cells group at Fraunhofer ISE. He studied physics at the Technical University of Darmstadt and at the KTH Royal Institute of Technology in Stockholm. Andreas received his Ph.D. degree from the Leibniz University of Hanover in 2007.
Florian Clement is head of the MWT Solar Cells and Printing Technology group at Fraunhofer ISE. He received his Ph.D. degree in 2009 from the University of Freiburg. Florian's research focuses on the development of pilot-line-processed MWT solar cells as well as on the development and evaluation of printing technologies.
Daniel Biro is department head in the field of thermal, PVD and printing technology/industrial cell structures. He studied physics at the University of Karlsruhe and at UMASS Amherst, USA. He completed his Ph.D. thesis at the University of Freiburg in 2003. Daniel coordinated the design and ramp-up of the Fraunhofer ISE production technology lab PV-TEC.
Ralf Preu is director of the Division for PV Production Technology and Quality Assurance at Fraunhofer ISE. He received a diploma degree in physics in 1996 from the University of Freiburg, Germany, and a Ph.D. degree in electrical engineering in 2000. Ralf also holds a diploma degree in economics, which he was awarded by the University of Hagen in 2003.
Abstract
This work presents large-area metal wrap through (MWT) solar cells with passivated surfaces made from Czochralski grown silicon (Cz-Si). Besides further improvement in conversion efficiency, the paper addresses industrial applicability of the fabrication process and technology. Three different base materials are compared – conventional boron-doped Cz-Si, gallium-doped Cz-Si and boron-doped magnetically cast Cz-Si (mCz-Si). Stencil printing is applied for front contact formation resulting in increased aspect ratio and finger homogeneity and thus low series resistance losses. Regarding material consumption, the presented cells allow for a reduction of silver usage by 30%. The peak efficiency for cells made from mCz-Si with an edge length of 156 mm is 20.2% (confirmed) in the annealed state.
About the authors
Benjamin Thaidigsmann studied physics in Tübingen, Germany, and finished his diploma thesis on quantum efficiency analysis of crystalline silicon solar cells in 2009 at Fraunhofer ISE. Benjamin then started his Ph.D. dissertation with Fraunhofer ISE, focusing on the development and characterization of highly efficient metal wrap through silicon solar cells with surface passivation.
Michael Linse studied printing and media technologies at Stuttgart Media University and finished his bachelor thesis on advanced screen and stencil printing technologies for crystalline silicon collar cells in 2010 at Fraunhofer ISE. Since then Michael has been working as a process engineer in the MWT Solar Cells and Printing Technology group at Fraunhofer ISE.
Andreas Wolf is head of the Thermal Processes and Passivated Solar Cells group at Fraunhofer ISE. He studied physics at the Technical University of Darmstadt and at the KTH Royal Institute of Technology in Stockholm. Andreas received his Ph.D. degree from the Leibniz University of Hanover in 2007.
Florian Clement is head of the MWT Solar Cells and Printing Technology group at Fraunhofer ISE. He received his Ph.D. degree in 2009 from the University of Freiburg. Florian's research focuses on the development of pilot-line-processed MWT solar cells as well as on the development and evaluation of printing technologies.
Daniel Biro is department head in the field of thermal, PVD and printing technology/industrial cell structures. He studied physics at the University of Karlsruhe and at UMASS Amherst, USA. He completed his Ph.D. thesis at the University of Freiburg in 2003. Daniel coordinated the design and ramp-up of the Fraunhofer ISE production technology lab PV-TEC.
Ralf Preu is director of the Division for PV Production Technology and Quality Assurance at Fraunhofer ISE. He received a diploma degree in physics in 1996 from the University of Freiburg, Germany, and a Ph.D. degree in electrical engineering in 2000. Ralf also holds a diploma degree in economics, which he was awarded by the University of Hagen in 2003.
©[2012] by Walter de Gruyter Berlin Boston
Artikel in diesem Heft
- Masthead
- Editorial
- Short Reports
- Prepare(d) for Impact: PV Cost Reduction and Beyond
- Industrial Silicon Wafer Solar Cells – Status and Trends
- High Efficiency Thin-Film Solar Cells
- PV Module Technology and Reliability – Status and Perspectives
- The Path to Industrial Production of Highly Efficient Metal Wrap Through Silicon Solar Cells
- Light Trapping Concepts for Photon Management in Solar Cells
- Asia Pacific Super Grid – Solar electricity generation, storage and distribution
- Notice from the Editorial Office
- Future Conferences on Sustainable Energy Science and Policy 2012/2013
Artikel in diesem Heft
- Masthead
- Editorial
- Short Reports
- Prepare(d) for Impact: PV Cost Reduction and Beyond
- Industrial Silicon Wafer Solar Cells – Status and Trends
- High Efficiency Thin-Film Solar Cells
- PV Module Technology and Reliability – Status and Perspectives
- The Path to Industrial Production of Highly Efficient Metal Wrap Through Silicon Solar Cells
- Light Trapping Concepts for Photon Management in Solar Cells
- Asia Pacific Super Grid – Solar electricity generation, storage and distribution
- Notice from the Editorial Office
- Future Conferences on Sustainable Energy Science and Policy 2012/2013
