Fig. 1: Synthesis and optical properties of CsPb0.6Sn0.4I3 perovskites. | Nature Communications

Fig. 1: Synthesis and optical properties of CsPb0.6Sn0.4I3 perovskites.

From: Sub-1.4eV bandgap inorganic perovskite solar cells with long-term stability

Fig. 1

a Schematic crystal structure of CsPb1−xSnxI3. b XRD pattern of CsPb0.6Sn0.4I3 perovskite thin film and its Rietveld refinement. c Tauc plot of CsPb0.6Sn0.4I3 perovskite thin film. d Variation of experimental (solid circle) and calculated (open circle) bandgaps as a function of x in CsPb1−xSnxI3. e DOS of a typical CsPb1−xSnxI3 (x = 0.5) perovskite calculated using DFT. Dashed curve is experimental UPS spectrum.

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