Research / 2020 / Article / Fig 3

Research Article

Constructing Stable and Potentially High-Performance Hybrid Organic-Inorganic Perovskites with “Unstable” Cations

Figure 3

(a) Computed band structures of the cubic phase (H5O2)PbI3, (H5O2)SnI3, (H5O2)PbBr3, and (H5O2)SnBr3. (b) Computed optical absorption spectra of (H5O2)PbI3 and (H5O2)SnI3. (c) Ferroelectric switching of (H5O2)SnI3. The blue arrows denote the polarization direction of cations and the whole crystal.