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Efficient PV, Low Cost

Wed, 08/28/2013 - 10:58am

2013 R&D 100 Winner
TetraCell Solar CellsThe photovoltaic industry is particularly sensitive to cost, and while pushing the envelope on conversion efficiency is a priority, efforts to reduce manufacturing costs is also a priority. Toward this end, TetraSun Inc. and the National Renewable Energy Laboratory have developed TetraCell solar cells, which offer a bifacial, high-efficiency ($3.09 per Watt-peak) solution for photovoltaic applications. TetraSun’s metallization technology replaces silver screen-printing by copper (Cu) electroplating, cutting the raw metal cost by a factor of 120 times. Further, since plated Cu is about twice as conductive as printed silver, the metal line widths can be reduced by a factor of two, resulting in a net reduction of shading while maintaining low resistive losses. Additionally, the solar cells include a novel surface passivation that reduces electrical carrier recombination on the surfaces by a factor of 10. This improvement raises output voltages up to 700 mV/cell and reduces the temperature coefficient to –0.3%/K, compared to –0.45%/K for competing products.

Technology
Solar cell

Developers
TetraSun Inc.
National Renewable Energy Laboratory


Development Team

TetraSun Inc.'s TetraCell Solar Cells development team.

 









The TetraCell solar cells Development Team
Oliver Schultz-Wittmann, Principal Developer, TetraSun Inc.
Mowafak Al-Jassim, National Renewable Energy Laboratory
Denis De Ceuster, TetraSun Inc.
Peter Hacke, National Renewable Energy Laboratory
Chunsheng Jiang, National Renewable Energy Laboratory
Richard Mitchell, National Renewable Energy Laboratory
Marth Symko-Davies, National Renewable Energy Laboratory
Adrian Turner, TetraSun Inc.
Harin Ullal, National Renewable Energy Laboratory

Award Year

2013

Organization

TetraSun Inc.
National Renewable Energy Laboratory (U.S. Dept. of Energy)

Developers

Oliver Schultz-Wittmann, Principal Developer, TetraSun Inc.
Mowafak Al-Jassim, National Renewable Energy Laboratory
Denis De Ceuster, TetraSun Inc.
Peter Hacke, National Renewable Energy Laboratory
Chunsheng Jiang, National Renewable Energy Laboratory
Richard Mitchell, National Renewable Energy Laboratory
Martha Symko-Davies, National Renewable Energy Laboratory
Adrian Turner, TetraSun Inc
Harin Ullal, National Renewable Energy Laboratory
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