We extend our novel low-voltage electrochemical method for oxide thin film formation from sol-gel monomers to include entrapment of organic molecules within the films. We also describe an extension of the method to titania thin films, which are obtained from titanium tetra-n-propoxide in alcoholic solutions by applying potentials in the range of +2.0 to -1.4 V to indium tin oxide electrodes. The film thickness (ranging between 20-1000 nm) is controllable by changing either the potential or the duration of its application. We demonstrate that this electrochemical method provides a convenient way for entrapment of organic dopants within the film. Four dyes were used for that purpose: Basic Blue 41, methylene-blue, tris(2,2′-bipyridine)iron(II) and tris(2,2′bipyridine)ruthenium(II).
|Number of pages
|Journal of Sol-Gel Science and Technology
|Published - Aug 2004
Bibliographical noteFunding Information:
This project was supported by the Israel Ministry for Science through the Tashtiot Projects (projects 2042 and 1095). We also thank the Horowitz Foundation for its financial support.
- Dye entrapment and doping
- Thin film