fig2
![Simultaneously enhancing moisture and mechanical stability of flexible perovskite solar cells via a polyimide interfacial layer](https://image.oaes.cc/3528c8b0-f9b4-42b0-a356-07aebb526bb6/4226.fig.2.jpg)
Figure 2. (A) J-V curves and (B) the PCE statistical distributions of 20 devices with different concentrations of PI. (C) The steady-state photocurrent measurements at maximum power point. (D) EQE spectra for the devices with (w/) and without (w/o) PI. PCE: High power conversion efficiency; EQE: external quantum efficiency; PI: polyimide.