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Ti and Sn co-doped anodic α-Fe2O3 films for efficient water splitting

Journal Article


Abstract


  • Hematite (α-Fe2O3) films were produced by anodic FeOOH deposition on FTO, followed by TiCl4 decoration and an appropriate heat treatment. Optimizing the amount of Ti addition (1.5 μL cm-2 of 0.2 M TiCl4) and annealing to 600 C/750 C allows to reach 1.4 mA cm-2 at 1.23 V (vs. RHE) with a maximum photocurrent of 3.1 mA cm-2 at 1.8 V (vs. RHE) in 1 M KOH under AM 1.5 (100 mW cm-2) simulated solar illumination. This comparably high photoresponse can be attributed to a combined Ti/Sn effect, the latter causing thermal Sn doping from the FTO. Photocurrent transients show that the main combined influence of Ti addition/Sn doping is a strong suppression of charge carrier recombination. This may be attributed to electronic effects but also to a different morphology observed for Ti treated samples. The work shows that simple anodic nanoporous films have a high potential for optimization towards highly efficient hematite based photoelectrodes. © 2013 Elsevier B.V. All rights reserved.

UOW Authors


  •   Wang, Lei (external author)
  •   Lee, Chong Yong
  •   Schmuki, Patrik (external author)

Publication Date


  • 2013

Geographic Focus


Citation


  • Wang, L., Lee, C. & Schmuki, P. (2013). Ti and Sn co-doped anodic α-Fe2O3 films for efficient water splitting. Electrochemistry Communications, 30 21-25.

Scopus Eid


  • 2-s2.0-84874051048

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1674

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 21

End Page


  • 25

Volume


  • 30

Place Of Publication


  • United States

Abstract


  • Hematite (α-Fe2O3) films were produced by anodic FeOOH deposition on FTO, followed by TiCl4 decoration and an appropriate heat treatment. Optimizing the amount of Ti addition (1.5 μL cm-2 of 0.2 M TiCl4) and annealing to 600 C/750 C allows to reach 1.4 mA cm-2 at 1.23 V (vs. RHE) with a maximum photocurrent of 3.1 mA cm-2 at 1.8 V (vs. RHE) in 1 M KOH under AM 1.5 (100 mW cm-2) simulated solar illumination. This comparably high photoresponse can be attributed to a combined Ti/Sn effect, the latter causing thermal Sn doping from the FTO. Photocurrent transients show that the main combined influence of Ti addition/Sn doping is a strong suppression of charge carrier recombination. This may be attributed to electronic effects but also to a different morphology observed for Ti treated samples. The work shows that simple anodic nanoporous films have a high potential for optimization towards highly efficient hematite based photoelectrodes. © 2013 Elsevier B.V. All rights reserved.

UOW Authors


  •   Wang, Lei (external author)
  •   Lee, Chong Yong
  •   Schmuki, Patrik (external author)

Publication Date


  • 2013

Geographic Focus


Citation


  • Wang, L., Lee, C. & Schmuki, P. (2013). Ti and Sn co-doped anodic α-Fe2O3 films for efficient water splitting. Electrochemistry Communications, 30 21-25.

Scopus Eid


  • 2-s2.0-84874051048

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1674

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 21

End Page


  • 25

Volume


  • 30

Place Of Publication


  • United States