Fig. 4From: Influence of Ag Nanoparticles with Different Sizes and Concentrations Embedded in a TiO2 Compact Layer on the Conversion Efficiency of Perovskite Solar CellsUV-vis absorption spectra of the a different sizes of Ag NP sample, b Ag/TiO2 samples with various sizes of Ag NPs, and c Ag/TiO2 PSC device samples with various sizes of Ag NPsBack to article page