Extended Data Fig. 10: Characterizations of tin perovskite films and LEDs prepared from precursor solutions with SnF2 and different amino acid additives.
From: Spin coating epitaxial heterodimensional tin perovskites for light-emitting diodes
a, Top view SEM images of the perovskite films. The chemical structures of amino acids are shown in black. The scale bars represent 1 μm. b, Cross-sectional SEM images of the perovskite films, which show bilayer structures. The scale bars represent 100 nm. c, XRD patterns. d-e, PL spectra excited from the front (d) and back (e) sides, respectively. f, EL spectra. g, Dependence of current density and radiance on voltage. h, EQE curves plotted against current density.
