Thermal stability of nitrogen-doped SrTiO{sub 3} films: Electronic and optical properties studies

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2713350· OSTI ID:20982763

Mi, Y Y; Yu, Z; Wang, S J; Gao, X Y; Wee, A T. S.; Ong, C K; Huan, C H. A. ^[1]

---

1. Department of Physics, National University of Singapore, Singapore 117542 (Singapore)

The thermal stability of nitrogen-doped SrTiO{sub 3} (001) films in terms of electronic and optical properties has been studied by using x-ray photoemission spectroscopy, x-ray absorption spectroscopy, and spectroscopic ellipsometry techniques. The chemical states of nitrogen in nitrogen-doped SrTiO{sub 3} films include both substitutional and interstitial states. The N 2p states localized above the O 2p-derived valence band maximum are attributed to the change of optical properties. Postannealing will induce the valence band edge shift due to the thermal instability of interstitial N states, which may degrade the photocatalysis of nitrogen-doped SrTiO{sub 3} films during applications.

• OSTI ID: 20982763
• Journal Information: Journal of Applied Physics, Vol. 101, Issue 6; Other Information: DOI: 10.1063/1.2713350; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
ANNEALING
CHEMICAL STATE
DOPED MATERIALS
ELLIPSOMETRY
INTERSTITIALS
NITROGEN
OPTICAL PROPERTIES
PHOTOCATALYSIS
PHOTOCHEMISTRY
PHOTOEMISSION
STRONTIUM TITANATES
THIN FILMS
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTRA
X-RAY SPECTROSCOPY