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  4. Laser Metal Bonding (LMB) - Low Impact Joining of Thin Aluminum Foil to PERC and TOPCon Rear Side Surfaces
 
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2020
Conference Paper
Title

Laser Metal Bonding (LMB) - Low Impact Joining of Thin Aluminum Foil to PERC and TOPCon Rear Side Surfaces

Abstract
We present the design, implementation and optimization of laser metal bonding (LMB), a new approach for joining thin aluminum foils and back surfaces of solar cells with a focus on low impact on the semiconductor and good adhesion. We succeeded in establishing an expulsion free laser process to create highly adhesive joints on dielectric layers without penetrating them. Electrically conducting contacts have been successfully created on PERC solar cells via LMB on locally opened nitride layers, achieving efficiencies up to 20.5%.
Author(s)
John, Oliver  
Emanuel, Gernot  
Paschen, Jan  
De Rose, Angela
Steinhauser, Bernd  
Brand, Andreas  
Nekarda, Jan  
Mainwork
47th IEEE Photovoltaic Specialists Conference, PVSC 2020  
Conference
Photovoltaic Specialists Conference (PVSC) 2020  
DOI
10.1109/PVSC45281.2020.9300595
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
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