Nano TiO₂ Coating on SnO₂: F Electrode in an Aqueous Solution

Abstract

We produced a nano TiO₂ coating on SnO₂: F (FTO) electrodes in an aqueous solution. Anatase TiO₂ crystallized in the transparent solution at 50°C for 10 min. The FTO electrodes with markedly uneven surface were successfully covered by nano TiO₂ without annealing. The TiO₂ was deposited on the electrodes with no clearance, thus attaining high adhesion strength. The coating showed high transparency, over 75%, in visible-light regions of 400 to 800 nm, which is similar to bare FTO electrodes. The electrodes had a unique surface structure resulting from the combination of uneven FTO surface and microasperity due to the nano TiO₂ coating.