Fig. 3From: Enhanced Performance of Planar Perovskite Solar Cells Using Low-Temperature Solution-Processed Al-Doped SnO2 as Electron Transport LayersXPS spectra of a survey, b Sn 3d, c O 1 s, d Al 2p, and e Cl 2p peaks for Al-SnO2 film deposited on the FTO substrate. f Normalized time-resolved PL decay curves of MAPbI3 films deposited on SnO2 (black line) and Al-SnO2 (red line) coated substratesBack to article page