The Electrical Contact Solution for Measuring Back Contact Solar Cells

Abstract

Due to the cell design, it is challenging to measure back contact cells. In this study, we have designed and tested a contact chuck based on printed circuit board (PCB) technology. Both full cells and cut Interdigitated Back Contact (IBC) cells were tested and compared to a conventional spring-loaded probes based measurement chuck. Results show that IV parameters, especially fill factor (FF), can be measured with high accuracy and repeatability. In this case, the FF results are closer to the FF of modules. The chuck can also be used for other measurements, for example, electroluminescence and spectral response. The PCB layout can be adjusted according to the cell design, providing a more flexible, faster, and cost-effective approach than the traditional measurement chuck. The technology is suitable for measuring back contact cells in lab environments and in industry.

Keywords

• Contacting
• Back contact
• IV Measurement