Abstract
Zn–Al layered double hydroxide (LDH) thin films intercalated with Eosin Y were prepared by the sol-gel method with hot water treatment. Sol-gel derived amorphous Al2O3–ZnO thin films were immersed in hot water containing Eosin Y. Extended interlayer spacing, in comparison with the Zn–Al LDH with carbonate anions, was observed after immersion in distilled water containing 5 mM Eosin Y at 100 °C for 30 min, indicating that crystals of Zn–Al LDH intercalated with Eosin Y were precipitated on the precursor film. Intercalated Eosin Y was confirmed to have high thermal durability compared with Eosin Y adsorbed on the LDH surface. A cell consisting of the heat-treated thin film of Zn–Al LDH intercalated with Eosin Y on fluorine-doped tin oxide (FTO)-coated glass, triiodide/iodide electrolyte, and Pt-loaded FTO glass was confirmed to work as a solar cell under visible light irradiation. Zn–Al layered double hydroxide thin films intercalated with Eosin Y were prepared by the sol-gel method with hot water treatment. Intercalated Eosin Y is confirmed to have high thermal durability.
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