Effective I-V Measurement Techniques for Busbarless and MultiBusbar Solar cells

Abstract

Conventional I-V testing of solar cells involves probe bars with voltage sense points and current sourcing points on the cell’s front busbars. However, this approach is not suitable for busbarless solar cells and multi-busbar (example: 12 to 18 narrow busbars) solar cells. This work introduces three measurement probe configurations for the I-V testing of busbarless and multibusbar solar cells: 1) probe bars that consist of a dense array of dipole testprobes for precise four-wire measurement; 2) staggered ring-type alternating source and sense contacts; 3) thin $200 \mu \mathrm{m}$ probe bars with contact points with negligible shading loss.