Which clear polymer serves as the encapsulant material sealing PV cells against moisture ingress?
Answer
Ethylene Vinyl Acetate (EVA)
The integrity of the photovoltaic cell structure requires careful layering and protection from environmental factors, especially moisture. Ethylene Vinyl Acetate, or EVA, is the specified clear polymer used as an encapsulant material for this critical sealing purpose. Its function is twofold: it seals the delicate cell structure to prevent moisture ingress, which can cause corrosion or electrical failure, and it acts as a bonding agent, securing the protective front glass layer to the active cells and the rear support structure. This sealing process is vital for maintaining the longevity and functionality of the module.
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