Fig. 6: Extension to blend systems based on nonfullerene acceptors.
From: Nanomorphology dependence of the environmental stability of organic solar cells

Evolution of UV–Vis absorption spectra of the a 80:20% PTB7:ITIC blend, 50:50% PTB7:ITIC blend, and pristine ITIC and the b 80:20% PTB7:Y6 blend, 50:50% PTB7:Y6 blend, and pristine Y6 during the aging process.