In-Depth Analysis on the Fabry-Perot Effect of Cs₂AgBiBr₆ Double Perovskite-Based Solar Cells via Optical Path Length Modulation

Figure 1

Schematics of the Cs₂AgBiBr₆ perovskite-based solar cell with FP cavity mode. Step 1 indicates the FTO/Cs₂AgBiBr₆ perovskite/Au structure, step 2 indicates the FTO/TiO₂/Cs₂AgBiBr₆ perovskite/Au structure, and step 3 indicates the FTO/TiO₂/Cs₂AgBiBr₆ perovskite/spiro-OMeTAD/Au structure. A red arrow symbol indicates the light traveling direction.