Influence of Module Structure on Reliability of Silicon Solar Cells

In order to investigate the influence of the difference in module structure on the degradation of the solar cell, two kinds of different solar modules were fabricated, and a high temperature and high humidity test was carried out and the degradation mode was compared by electrical characteristics and electroluminescence inspection. Although degradation of output occurred in both modules, different degradation modes were confirmed by electroluminescence images. It is assumed that the difference in degradation mode between these modular structures is due to the difference in concentration distribution inside the module of moisture intruded into the module and acetic acid generated from the encapsulant inside the module.