Sanoria, A.A.SanoriaUlbricht, D.D.UlbrichtSchuster, T.T.SchusterBrüll, RobertRobertBrüll2022-03-052022-03-052015https://publica.fraunhofer.de/handle/publica/24259310.1039/c5ra18988hCrosslinked ethylene vinyl acetate (EVA) resin is the preferred material for encapsulation of photovoltaic (PV) modules. Yet, profiling the spatial homogeneity of crosslinking in a quantitative and non-destructive way still remains a challenge. With the aid of reference techniques and using carefully prepared and well characterized model systems we have developed a protocol for Raman microscopy, which can determine the degree of crosslinking in EVA sheets in a quantitative manner. The new method has then been applied to characterize inhomogeneities with regard to crosslinking in EVA samples on various length scales, going down to a few mm. Finally, this method has been used to study crosslinking in EVA/glass laminates. The applicability and limitations of measuring crosslinking under glass was probed.enjournal article