Characterization of metallic electrical contacts to SnO2 thin films lightly doped with Eu3+ ions, and photo-induced resistivity

► Electrodes on sol-gel SnO2:Eu, with different metals, deposited by evaporation. ► Evaluation of Schottky barrier for SnO2 with Sn, In and Al. ► Possible oxidation of Al contact caused by thermal annealing. ► Blue and ultraviolet excitation on Sn/SnO2:0.05%Eu junction.