fig4
![Organic-inorganic hybrid quasi-2D perovskites incorporated with fluorinated additives for efficient and stable four-terminal tandem solar cells](https://image.oaes.cc/46accc8e-a1ea-43df-8cde-bb4f853f8fc3/5379.fig.4.jpg)
Figure 4. Structural and photoresponse influences of 3-TFMBAI doping ratios. (A) XRD patterns (peaks labeled with “#” are derived from FTO), (B) UV-vis spectra, (C) (Ahv)2vs.hv curves and (D) typical J-V plots of quasi-2D perovskites with different 3-TFMBAI doping concentrations (n = 10, 20, 40 and 60).