Fig. 1: Direct formation of α-FAPbI3 film using MACl-free perovskite precursor solution. | Nature Communications

Fig. 1: Direct formation of α-FAPbI3 film using MACl-free perovskite precursor solution.

From: Mitigating residual MA+ for stable FAPbI3 perovskite photovoltaics

Fig. 1

A Schematic representation of α-FAPbI3 formation using an additive-free FAPbI3 perovskite precursor. B Schematic diagram illustrating the reduction of phase transition energy for α-FAPbI3. C Formation energies calculations of FAPbI3 with FASCN, MAI, and MASCN. D Phase transition process of the unannealed control and target FAPbI3 film. E In situ XRD pattern of control and target FAPbI3 films during the annealing process.

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