Ionomer as encapsulation material: composition and application
Encapsulants and Backsheet materialsThe solar module backsheets contain multiple layers of barrier films and adhesives. The backsheet construction is critical in protecting the solar cells from different environmental conditions like moisture, UV exposure and other performance threats while also improving solar module efficiency by aiding the reduction of partial module cost. The encapsulation film protects the solar cell and ensures its reliability and performance; its role is providing optical and electrical transmissivity and keeping the moisture out. Encapsulants provide an opportunity for realizing greater efficiencies in the module manufacturing processWhat is Ionomer?Ionomer polymer is composed of repeat units of both electrically neutral repeating units and ionized units that are bonded covalently to the polymer backbone as pendant group moieties. Usually no more than 15 mole percent are ionized.Its physical properties include good electrical conductivity and viscosity. Applications for ionomers include sealing tape and thermoplastic elastomers. Common examples for it include polystyrene sulfonate, Nafion and Hycar.Ionomer encapsulants use in solar panelsIonomer encapsulants significantly increase the efficiency of solar cells, and the solar panels power output. DuPont produced Surlyn ionomer encapsulant materials deliver long term, proven protection for solar cells and circuitryThey use other Ionomer materials as encapsulants in niche applications. PV ionomer encapsulants deliver long term protection for the PV modules, increase module durability and production efficiency and can also significantly enhance long term power generation efficiency. Its based encapsulants are weather resistant and provide good strength and long term durability to PV module manufacturers. Other ionomer composition is suitable for use as a backsheet in a photovoltaic modules.