Chemical bath deposition of SnO2 and Cd2SnO4 thin films

► A new approach of chemical bath deposition (CBD) of SnO2 thin films is reported. ► The possibility of fabricating a transparent conducting oxide layer of Cd2SnO4 thin films using CBD is investigated. ► Annealed CBD-SnO2 films are orthorhombic, highly stoichiometric, and transparent with an optical band gap of ∼4.42 eV. ► Cd2SnO4 films with a band gap as high as 3.08 eV are obtained. ► Cd2SnO4 films with a carrier density as high as 1.7 × 1020 cm−3; and a resistivity as low as 1.01 × 10−2 Ω-cm are achieved.