Figure 5.

Photovoltaic Performance of Cs_xDMA_1-xPbI₃ Perovskite Solar Cells

(A) J-V curves of the solar cells based on Cs_xDMA_1-xPbI₃ perovskite films with different compositions (Cs from 0.3 to 0.9); see also Table S3.

(B) PCE of devices with varied Cs_xDMA_1-xPbI₃ films as a function of the ratio of CsI/DMAPbI₃ in the precursor (Cs from 0.3 to 0.9).

(C) J-V curves of the champion device (Cs-0.5) in reverse and forward scan directions.

(D) Steady-state PCE and current density of the champion device (Cs-0.5) measured at maximum-power point of 0.849 V.

(E) External quantum efficiency spectra of the best solar cell based on the Cs-0.5 perovskite film.

(F) Evaluation of long-term stability of the device (Cs-0.5) stored in air (RH 20% ± 5%).