Fig. 1: Construction and structure of SAB.
From: Self-assembled bilayer for perovskite solar cells with improved tolerance against thermal stresses
a, The proposed mechanism for the coupling reaction between TATPA and 2PACz. b, XPS spectra of TATPA, 2PACz and SAB films, where the solid lines represent the fits to the data and the dashed lines show the individual components, each fitted to a Gaussian distribution. c, 1H NMR spectra of TATPA, NECz and a mixture of NECz, TATPA and 2PACz. Inset: chemical structures of TATPA, NECz and 2PACz are shown with labels corresponding to NMR peaks38. d,e, Two-dimensional GIWAXS patterns of 2PACz (d) and SAB (e). IP, in-plane; OOP, out-of-plane. Diffraction signals with q > 2.0 Å−1 are attributed to ITO substrates. f, A schematic diagram illustrating the structure of SAB.
