(a) Photography of the backsheet/encapsulant/cell stack removed from the front encapsulant/glass stack. (b) Photography of the front encapsulant removed from the front glass with different positions indicated. (c) Emission spectra of the encapsulant excited at 360 nm. (d) Transmission spectra from the various positions. A non-aged laminated modern EVA film is given as a reference. (e) Yellow index and average transmission extracted from the transmission spectra. (f) FTIR spectroscopy from the various positions.