Fig. 4From: Fabrication and Properties of High-Efficiency Perovskite/PCBM Organic Solar Cells a Absorbance spectra of the CH3NH3PbI3 perovskite films with different thicknesses on glass substrates. b Absorption spectra of samples with perovskite and PCBM/perovskite films on PEDOT:PSS/ITO substratesBack to article page