The effects of platinum (Pt) doping on the structure and photoelectrochemical properties of Fe2O3electrodes have been investigated. The Pt-doped Fe2O3 electrodes were prepared by sol-gel and spin coated on fluorine-tin-oxide coated glass substrate. Influences of dopant concentration on material properties and photoelectrochemical characteristics were examined. Results of XRD and XPS showed that α-Fe2O3 can be obtained using 500 oC annealing in air. The band gaps of the samples obtained from reflectance and transmittance spectra measurement were found to vary from 1.98 to 2.03 eV. Theflat band potentials of the samples were obtained from the Mott-Schottky analysis and found to be in the range of -0.135 V to -0.6 V. The maximum photocurrent density of undoped and 0.1 at.% Pt-doped Fe2O3 electrodes was 0.5 mA/cm2 and 0.7 mA/cm2 under a 300 W Xe lamp system, respectively. Thegood photoelectrochemical results of the Pt-doped Fe2O3 electrode warrant further investigation for broader applications in the future.
|Number of pages||9|
|Journal||International Journal of Electrochemical Science|
|State||Published - 30 Sep 2013|
- Photoelectrochemical method
- Sol-gel process
- Thin films