Evaluation of band alignment of srnbo2n using hard x-ray photoelectron spectroscopy

Toru Nakamura, Ryosuke Kikuchi, Yoshiyuki Yamashita, Takashi Kuroda, Toyohiro Chikyow, Yasushi Kaneko

Research output: Contribution to journalArticle

Abstract

The absolute band position is a key parameter to design and optimize functionalities of photoelectrochemical cells. We determine the absolute band position of SrNbO2N using hard X-ray photoelectron spectroscopy on epitaxial SrNbO2N films. We reveal that the conduction band minimum lies 0.36 ± 0.07 eV negative than the water reduction energy and the valence band maximum lies 0.22 ± 0.07 eV positive than the water oxidation energy. In other words, the band edges lie in positions that straddle the redox potential of water.

Original languageEnglish
Pages (from-to)5528-5532
Number of pages5
JournalJournal of Physical Chemistry C
Volume124
Issue number10
DOIs
Publication statusPublished - 2020 Mar 12
Externally publishedYes

ASJC Scopus subject areas

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

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    Nakamura, T., Kikuchi, R., Yamashita, Y., Kuroda, T., Chikyow, T., & Kaneko, Y. (2020). Evaluation of band alignment of srnbo2n using hard x-ray photoelectron spectroscopy. Journal of Physical Chemistry C, 124(10), 5528-5532. https://doi.org/10.1021/acs.jpcc.9b10878