Design of Narrow-Gap: A Passivated Codoping Approach for Enhanced Photoelectrochemical Activity
Top Cited Papers
- 20 January 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 102 (3), 036402
- https://doi.org/10.1103/physrevlett.102.036402
Abstract
To improve the photoelectrochemical activity of TiO2 for hydrogen production through water splitting, the band edges of TiO2 should be tailored to match with visible light absorption and the hydrogen or oxygen production levels. By analyzing the band structure of TiO2 and the chemical potentials of the dopants, we propose that the band edges of TiO2 can be modified by passivated codopants such as (Mo+C) to shift the valence band edge up significantly, while leaving the conduction band edge almost unchanged, thus satisfying the stringent requirements. The design principle for the band-edge modification should be applicable to other wide-band-gap semiconductors.Keywords
This publication has 27 references indexed in Scilit:
- Photoelectrochemical Study of Nitrogen-Doped Titanium Dioxide for Water OxidationThe Journal of Physical Chemistry B, 2004
- Highly Efficient Formation of Visible Light Tunable TiO2-xNx Photocatalysts and Their Transformation at the NanoscaleThe Journal of Physical Chemistry B, 2003
- Carbon-doped Anatase TiO2 Powders as a Visible-light Sensitive PhotocatalystChemistry Letters, 2003
- Efficient Photochemical Water Splitting by a Chemically Modified n-TiO 2Science, 2002
- Band gap narrowing of titanium dioxide by sulfur dopingApplied Physics Letters, 2002
- Photoelectrochemical cellsNature, 2001
- Visible-Light Photocatalysis in Nitrogen-Doped Titanium OxidesScience, 2001
- A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water SplittingScience, 1998
- Environmental Applications of Semiconductor PhotocatalysisChemical Reviews, 1995
- Electrochemical Photolysis of Water at a Semiconductor ElectrodeNature, 1972