Fig. 4From: Tin and Oxygen-Vacancy Co-doping into Hematite Photoanode for Improved Photoelectrochemical Performancesa J-V curves of the 15% Sn doped hematite photoanode with post-RTP at different temperatures. b, c The corresponding photoelectrochemical impedance spectra and Mott-Schottky plots, respectively. d The change of open circuit potential under the light-on/light-off circleBack to article page