Sunpower Corporation

Total Marketing Services

Maxeon Solar Pte. Ltd.

Jens-Dirk Moschner

Gabriel Harley

Taeseok Kim

David D Smith

Richard Hamilton Sewell

Michael T Morse

Matthieu Moors

Nils-Peter Harder

Robert Woehl

Michel Arsène Olivier Ngamo Toko

Kim Taeseok

Approaches for the foil-based metallization of solar cells and the resulting solar cells are described. In an example, a solar cell includes a substrate. A plurality of alternating N-type and P-type semiconductor regions is disposed in or above the substrate. A conductive contact structure is disposed above the plurality of alternating N-type and P-type semiconductor regions. The conductive contact structure includes a plurality of metal seed material regions providing a metal seed material region disposed on each of the alternating N-type and P-type semiconductor regions. A metal foil is disposed on the plurality of metal seed material regions, the metal foil having anodized portions isolating metal regions of the metal foil corresponding to the alternating N-type and P-type semiconductor regions.

Foil-based metallization of solar cells

Methods of fabricating solar cells using a metal-containing thermal and diffusion barrier layer in foil-based metallization approaches, and the resulting solar cells, are described. For example, a method of fabricating a solar cell includes forming a plurality of semiconductor regions in or above a substrate. The method also includes forming a metal-containing thermal and diffusion barrier layer above the plurality of semiconductor regions. The method also includes forming a metal seed layer on the metal-containing thermal and diffusion barrier layer. The method also includes forming a metal conductor layer on the metal seed layer. The method also includes laser welding the metal conductor layer to the metal seed layer. The metal-containing thermal and diffusion barrier layer protects the plurality of semiconductor regions during the laser welding.

Solar cell having Ti- or Ta-containing thermal and diffusion barrier layer for foil-based metallization

Method of using laser welding to ohmic contact of metallic thermal and diffusion barrier layer for foil-based metallization of solar cells

Growing community of inventors

Heverlee, Belgium

Jens-Dirk Moschner