Thermal decomposition of EVA composite encapsulant of single junction amorphous silicon photovoltaic (PV) module

摘要

The EVA, decomposition of single junction amorphous silicon solar module (a-Si:H) observed during outdoor deployment has been studied. The decay and thermal breakdown of EVA in the encapsulating material o f PV module is a sign of low quality in thin film solar cell. The decomposition of EVA due to localized heating affects the reliability and efficiency of PV module. It also has negative influence on the conductive ZnO 2 layer and the heat dissipating mechanisms of the PV module. The thermal susceptibility and stability of the encapsulating material was investigated using Thermogravometric (TGA), result shows low quantity of EVA substance in the affected region due to loss of volatile substance from the affected region after decomposition.