Photoelectrochemical properties of crystalline perovskite lanthanum titanium oxynitride films under visible light

Claire Le Paven-Thivet, Akio Ishikawa, Ahmed Ziani, Laurent Le Gendre, Masaaki Yoshida, Jun Kubota, Franck Tessier, Kazunari Domen

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

Thin films of the lanthanum titanium oxynitride perovskite (LaTiO xNy) synthesized by reactive radio-frequency sputtering on conductive Nb-doped strontium titanate (Nb:SrTiO3) substrates are evaluated as photoelectrodes for water splitting reaction under visible light. The films are characterized by X-ray diffraction analysis, energy-dispersive spectroscopy, scanning electron and atomic force microscopy, and ultraviolet - visible spectroscopy. Thin films with polycrystalline, oriented, or epitaxial structures are obtained depending on the substrate temperature and plasma composition. The band-gap energies of the films thus prepared are in the range 2.05-2.35 eV. Photoelectrochemical measurements reveal that the photoactivity of these films increases with the quality of film crystallization. The flat-band position of LaTiOxNy is found to change with pH of the reactant solution. Surface modification with colloidal IrO2is also demonstrated to result in a marked increase in photoactivity, with the modified epitaxial LaTiOxNy film exhibiting a photocurrent density of ca. 70 μA cm-2 at +1.0 V vs. Ag/AgCl at pH 4.5 in aqueous Na2SO4 solution under irradiation at visible wavelengths (λ > 420 nm).

Original languageEnglish
Pages (from-to)6156-6162
Number of pages7
JournalJournal of Physical Chemistry C
Volume113
Issue number15
DOIs
Publication statusPublished - 2009 Apr 16
Externally publishedYes

Fingerprint

Lanthanum
oxynitrides
Titanium
lanthanum
Perovskite
titanium
Crystalline materials
Thin films
Epitaxial films
Ultraviolet visible spectroscopy
plasma composition
Substrates
Strontium
Crystallization
Photocurrents
water splitting
X ray diffraction analysis
Sputtering
Surface treatment
Energy dispersive spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Paven-Thivet, C. L., Ishikawa, A., Ziani, A., Gendre, L. L., Yoshida, M., Kubota, J., ... Domen, K. (2009). Photoelectrochemical properties of crystalline perovskite lanthanum titanium oxynitride films under visible light. Journal of Physical Chemistry C, 113(15), 6156-6162. https://doi.org/10.1021/jp811100r

Photoelectrochemical properties of crystalline perovskite lanthanum titanium oxynitride films under visible light. / Paven-Thivet, Claire Le; Ishikawa, Akio; Ziani, Ahmed; Gendre, Laurent Le; Yoshida, Masaaki; Kubota, Jun; Tessier, Franck; Domen, Kazunari.

In: Journal of Physical Chemistry C, Vol. 113, No. 15, 16.04.2009, p. 6156-6162.

Research output: Contribution to journalArticle

Paven-Thivet, CL, Ishikawa, A, Ziani, A, Gendre, LL, Yoshida, M, Kubota, J, Tessier, F & Domen, K 2009, 'Photoelectrochemical properties of crystalline perovskite lanthanum titanium oxynitride films under visible light', Journal of Physical Chemistry C, vol. 113, no. 15, pp. 6156-6162. https://doi.org/10.1021/jp811100r
Paven-Thivet, Claire Le ; Ishikawa, Akio ; Ziani, Ahmed ; Gendre, Laurent Le ; Yoshida, Masaaki ; Kubota, Jun ; Tessier, Franck ; Domen, Kazunari. / Photoelectrochemical properties of crystalline perovskite lanthanum titanium oxynitride films under visible light. In: Journal of Physical Chemistry C. 2009 ; Vol. 113, No. 15. pp. 6156-6162.
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