Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Top-view SEM images of the {en}FASnI3 crystals.
  • fig. S2. TGA spectra of FAI, enI2, and SnI2 powder.
  • fig. S3. Top-view SEM images of the {en}FASnI3 perovskite films with various amounts of en loading.
  • fig. S4. 1H NMR spectra of the films with and without en loading.
  • fig. S5. Bandgaps of the {en}FASnI3 perovskite films.
  • fig. S6. UV-vis optical absorption spectra, J-V, and EQE curves of the perovskite absorbers with various amounts of en loading.
  • fig. S7. Air stability of UV-vis absorption spectra and XRD patterns of the {en}FASnI3 perovskite films.
  • fig. S8. Thermal stability test of the {en}FASnI3 perovskite films.
  • fig. S9. Steady-state efficiency of an {en}FASnI3 solar cell with 10% en loading.
  • fig. S10. J-V curves of {en}FASnI3 solar cells with larger active areas.
  • table S1. Unit cells, bonding parameters, and refinement parameters of {en}FASnI3 crystals.
  • table S2. Comparison of the initial and final FA/en ratio on NMR and density measurements.
  • table S3. Comparison of experimental and theoretical crystal densities of all reported materials.
  • table S4. Summary of the photovoltaic parameters of the {en}FASnI3 solar cells with various amounts of en loading.

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