Photoelectrochemical study of thin anatase TiO{sub 2} films prepared by metallorganic chemical vapor deposition
- Delft Univ. of Technology (Netherlands). Lab. for Applied Inorganic Chemistry
Thin films of TiO{sub 2} have found application as antireflection coatings, transparent conductors, dielectrics, electrochromic films, and photoelectrodes. Titanium dioxide is also used as a self-cleaning coating on windows and tiles. Thin films of TiO{sub 2} have been prepared by metallorganic chemical vapor deposition. The resulting anatase films are highly resistive. By electrochemical doping, the donor density can easily be raised by two orders of magnitude, resulting in a conducting film. From optical and photocurrent measurements, an indirect bandgap of 3.26 eV is derived for polycrystalline anatase films. Electrolyte electroreflection reveals a direct optical transition of anatase at 3.8 eV. The anatase electrodes can be sensitized by zinc carboxyphenyl porphyrin.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 509388
- Journal Information:
- Journal of the Electrochemical Society, Vol. 144, Issue 4; Other Information: PBD: Apr 1997
- Country of Publication:
- United States
- Language:
- English
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