SPLTRAK Abstract Submission
Corrosion testing of solar cells: Insights to wear-out mechanisms
Andrew Fairbrother1, Luca Gnocchi1, Christophe Ballif1, 2, Alessandro Virtuani1
1EPFL, Neuchatel, Switzerland
/2CSEM, Neuchatel, Switzerland

Corrosion is a major end-of-life degradation mode in photovoltaic modules. Herein, an accelerated corrosion test for screening new cell, metallization, and interconnection technologies is presented. The top glass and encapsulation layers were removed from modules to expose the solar cells. These “opened” modules were then placed in acetic acid baths under varying concentration, temperature, and bias. Three cell technologies were tested, including Al-BSF, PERC, and SHJ. The corrosion test can be optimized to match wear-out corrosion behavior of field modules with greater precision and shorter times than standard tests, and can be applied to corrosion sensitive components to assess their durability.