Fig. 3: Spectroscopic analyses of the films during the aging process.
From: Nanomorphology dependence of the environmental stability of organic solar cells
Evolution of a UV–Vis absorption spectra, b normalized absorbance at 0–1 vibronic transition, and c FTIR spectra before (dashed lines) and after (solid lines) aging for 120 min of pristine PTB7, 80:20% PTB7:PCBM and 50:50% PTB7:PCBM blend under simulated AM 1.5 G illumination in dry air.
