Key Words:Dye-sensitized solar cells;Characterization - Composite films - Crystallography - Nanorods - Nanostructured materials - Oxide minerals - Perovskite - Photoelectricity - Single crystals - Solar cells - Strontium alloys - Strontium titanates - Titanium dioxide;Charge carrier transfer - Condensation process - Double layer structure - Hydrothermal methods - Photo-electric conversion efficiency - Photo-electrical properties - Photoanode materials - Structural characterization
Abstract:In this research, perovskite SrTiO<inf>3</inf>particles are synthesized by a hydrothermal method, and TiO<inf>2</inf>with a double-layer structure is grown on the SrTiO<inf>3</inf>surface by a hydrolysis–condensation process. Structural characterizations reveal that TiO<inf>2</inf>comprises of two phases: anatase film at the bottom and single-crystal rutile nanorods grown along the [110] direction on top. The TiO<inf>2</inf>–SrTiO<inf>3</inf>composite film is investigated as photoanode material for dye-sensitized solar cells. In comparison with pure TiO<inf>2</inf>and SrTiO<inf>3</inf>, the composite photoanode shows a much better performance in photoelectric conversion efficiency (1.35 %), which is about 2 and 100 times as efficient as pure TiO<inf>2</inf>and SrTiO<inf>3,</inf>respectively. This indicates that the composite structure can facilitate charge carrier transfer and reduce electron–hole recombination to enhance photoelectrical properties of TiO<inf>2</inf>-based photoanode materials. © 2016, Springer-Verlag Berlin Heidelberg.
Volume:122
Issue:4
Translation or Not:no