Fig. 2From: Tin and Oxygen-Vacancy Co-doping into Hematite Photoanode for Improved Photoelectrochemical Performancesa XRD patterns. b Locally enlarged image of a indicated by the dashed line box. c Raman spectra and XPS spectra of d Fe 2p. e O 1s and f Sn 3d in various hematite photoanodesBack to article page