Fig. 6
Complex impedance diagrams (Nyquist plots) and equivalent circuit of multilayer system consists of perovskite organic-inorganic films prepared at the ratio of starting reagents (PbI2 and CH3NH3І) 1:1 (1), 1:2 (2), and 1:3 (3) on glass substrate at an illumination of 30 klx. Measurements performed at a voltage of 1 V in a dry atmosphere. The numbers above the curves are the frequency (Hz)