Fig. 12. (a) Schematic energy-level diagram of CsPbI2Br PSCs without and with the 0.4% ZrCl4 dopant; (b) PL of the without and with 0.4% ZrCl4-doped CsPbI2Br films. (c) TRPL of the without and with 0.4% ZrCl4-doped CsPbI2Br films. (d) J–V curves of the PSCs without and with the 0.4% ZrCl4 dopant. (e) Air storage stability and (f) thermal stability of the PSCs without and with 0.4% ZrCl4. Figure reprinted with permission from ref. 138.
