Fig. 8

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(a) Wavelength-dependent reflectance for different surfaces; Annual Energy Yield of 2T bi-facial tandem based on poly-SiOx bottom cell for (b) varying top cell perovskite thickness on different ground surfaces (perovskite bandgap = 1.68 eV) and (c) varying top cell perovskite bandgap on different ground surfaces (perovskite thickness = 550 nm). The above simulations are carried out in Rome at a tilt of 27°.
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