Fig. 2: Correlation optical reflection with molecular orientation in the film.
From: Intrinsic light reflection of conjugated films towards high-performance organic solar cells
a Grazing incident wide angle X-ray scattering (GIWAXS) pattern of Y6 before and after thermal annealing (TA) treatment. The solid lines represent diffusion range of corresponding diffractions. b (300) orientation ratio in the range of 90-45° azimuth angle. After TA treatment, Y6 molecules are more uniformly aligned with the face-on orientation on substrate, which is further evidenced by other diffraction spots shown in (a). c Schematic diagram of declination of Y6 molecule along different directions. d Light absorption spectra of Y6 films before and after TA treatment. e Schematic diagram of relation between molecular orientation and photo-molecule interaction. f S2D parameter versus maximum reflection (Rmax) plots of classical 1D and 2D-polarized organic molecules before and after TA treatment measured in this work. Source data are provided as a Source Data file.
