Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 11, Issue 10, Pages D81-D84Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2968951
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Funding
- National Science Council of Taiwan [NSC95-2221-E-218-019]
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This article demonstrates that a visible light active N-doped TiO2 film can be fabricated by atomic layer deposition (ALD) with titanium chloride and ammonia water as the precursors. A 1.60 atom % N-doping anatase TiO2 film has been successfully grown on an n(+)-silicon substrate. The ratio of substitutional N doping to the total N doping as high as 70% is achieved that extends the long-wavelength cutoff of TiO2 to 550 nm. Results from the analysis of incident photon-to-current efficiency and potential-dependent photocurrent density suggest that the visible light activity of ALD N-doped TiO2 films can be further improved by reducing the carrier recombination rate and increasing optical absorption efficiency. (C) 2008 The Electrochemical Society.
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