Record high performance modules based on screen printed MWT solar cells

Abstract

This paper describes an integrated approach towards the realisation of modules based on rear contacted solar cells joining experiences in cell and module manufacturing. While research is ongoing on novel interconnection schemes, from an analysis of different possibilities, a methodology was selected that allows the introduction of the interconnection approach within a production line with minor investments. To support the suggested methodology a number of structural changes were required in the Metallisation Wrap Through cells. However, as these were limited to the layout of the contact pattern, no changes to the established cell process were needed except for the introduction of new screens. Based on the developed simple planar interconnection technology, a number of modules was manufactured with large area (100cm2) multi-crystalline rear contacted solar cells demonstrating the electrical added value of rear contacted solar cells and attaining power densities of over 145 W/m2.