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

Figure 8

Spatial distribution of of absorption layer within Cs₂AgBiBr₆ double perovskite-based architecture with different spiro-OMeTAD layer thicknesses under solar light plane wave illumination. (a) Under 400–500 nm wavelength light illumination. (b) Under 500–600 nm. (c) Under 600–700 nm. (d) Under 700–800 nm. (e) Under 800–900 nm. The black, red, and blue spectra indicate the of the Cs₂AgBiBr₆ double perovskite-based architecture with 110 nm, 150 nm, and 200 nm thickness of spiro-OMeTAD layer, respectively.

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