Fig. 5From: Efficient TiO2 Surface Treatment Using Cs2CO3 for Solution-Processed Planar-Type Sb2S3 Solar CellsXPS spectra of a survey scan and Cs 3d peak, b Ti 2p peak, c O 1 s peak for c-TiO2 surface with and without Cs2CO3 treatment, and d depth profile for Cs 3d peak for FTO/c-TiO2/Cs2CO3 sample to determine the thickness of Cs-related layerBack to article page