Abstract
The present work examines the deposition of Ag nanoparticles on anodic TiO2 nanotubes in order to improve solar energy conversion by increasing the optical absorption of dye. Ag nanoparticles are successfully deposited on TiO2 nanotube layers. The size of nanoparticles is increased when amorphous TiO2 nanotubes are crystallized and the tube diameter is increased. Photocurrent for dye-sensitized TiO2 nanotubes is increased by the deposition of Ag nanoparticles, but the increment is decreased during dye-sensitization. This may be ascribed to the dissolution of Ag nanoparticles during the sensitization and the decreased plasmon resonance effect by thickening the dye layer on Ag nanoparticles.
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