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Proceedings Paper

Synthesis and characterization of titanium doped hematite for photoelectrochemical water splitting
Author(s): Houwen Tang; M. Matin; Heli Wang; Mowafak Al-Jassim; John Turner; Yanfa Yan
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Paper Abstract

Hematite is a potential candidate for hydrogen production by photoelectrochemical (PEC) decomposition of water due to its good bad gap and excellent chemical stability. However, its poor conductivity limits its PEC performance. Titanium has been predicted to be a good choice of dopant for improving the conductivity. Most of the Ti-doped hematite films are produced by solution based method. However, such procedure may introduce impurities. RF sputtering is a clean vacuum deposition technique, which is perfect for the synthesis of metal oxide. In this paper, we report our synthesis of Tidoped hematite thin films by RF magnetron co-sputtering of iron oxide and titanium targets at various conditions. Our work shows that the structure and morphology of iron oxide can be modified by controlling the doping concentration of titanium. Moreover, we confirmed that the PEC performance of Ti-doped iron oxide film is significantly better than the undoped one.

Paper Details

Date Published: 19 September 2011
PDF: 19 pages
Proc. SPIE 8109, Solar Hydrogen and Nanotechnology VI, 81090W (19 September 2011); doi: 10.1117/12.897753
Show Author Affiliations
Houwen Tang, National Renewable Energy Lab. (United States)
Univ. of Denver (United States)
M. Matin, Univ. of Denver (United States)
Heli Wang, National Renewable Energy Lab. (United States)
Mowafak Al-Jassim, National Renewable Energy Lab. (United States)
John Turner, National Renewable Energy Lab. (United States)
Yanfa Yan, National Renewable Energy Lab. (United States)

Published in SPIE Proceedings Vol. 8109:
Solar Hydrogen and Nanotechnology VI
Yasuhiro Tachibana, Editor(s)

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