STUDY OF THE PROTECTIVE PROPERTIES OF ORGANIC COATINGS FOR ENCAPSULATION OF PHOTOVOLTAIC CELLS

V. MARZOCCHI; C.R. TOMACHUK; A.R. DI SARLI; F. BELLUCCI

ChemXpress

GLOBAL SCIENTIFIC INC.

Año: 2014 vol. 4 p. 312 - 324

2320-1967

The protective properties of encapsulating materials such as organic coatings deposited on sim- plified photovoltaic cells modules (glass/ZnO/encapsulating material) and subjected to 0.6 M NaCl solution were investigated. The organic coatings lifetime is related to the reactants diffusion into the bulk and to the adhesion at the ZnO/encapsulating material inter- face. EIS measurements were used to investigate the corrosion phenomena at the ZnO/encapsulating interface. Capacitance Fast Transient Technique (CFTT) was utilized to evaluate water uptake and the barrier properties of the polymeric films, while DSC measure-ments and SEM micrographs were employed for samples’ characterization. According to the EIS data obtained and analyzed along the tests in neutral chloride solution, the protective performance afforded by the Ionomeric coating (polyethylene-acrylic acid copolymerincluding ionic species)wasmuchmore effective than the corresponding to the EVA (ethyl vinyl acetate copolymer) and PU (polyurethane) coatings.