Mechanical and electrical properties of wave-shaped wires for low-stress interconnection of solar cells

To choose an optimal interconnection concept for solar cells, the mechanical, as well as the electrical properties of the interconnectors have to be considered. This study correlates the advantageous longitudinal softness of wave-shaped wires, which potentially leads to a significant decrease of the thermomechanical stress in solar cells and of the bowing of back-contact solar cells, with the disadvantageous increase of the electrical resistance caused by the shaping process. The findings enable an optimization of a wire-based interconnection concept for back-contact solar cells.