Characterisation of etylene vinyl acetate for photovoltaic application

The purpose of this investigation is to better define the behaviour of EVA-based encapsulant before and after photovoltaic module encapsulation process. All tests and samples were processed by vacuum lamination on laboratory scale equipment using the commercial time-temperature vacuum schedule recommended for standard cure (A9918p grade EVA). In this paper we use the thermally stimulated current (TSC) measurements to study the properties of EVA. At a gel content of 70%, which is the required rate to avoid delamination problems in the field, the results show an improvement of electrical and mechanical properties due to the crosslinking agent. We found that the encapsulation process of photovoltaic module type UDTS 50 using single tempered glass as the front cover and white tedlar as the back cover improve module efficiency.