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|Title:||Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method||Authors:||Huang, H.
Tan, Ooi Kiang
|Keywords:||DRNTU::Engineering::Electrical and electronic engineering||Issue Date:||2012||Source:||Ghaffari, M., Huang, H., Tan, O. K., & Shannon, M. (2012). Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method. CrystEngComm, 14(21), 7487-7492.||Series/Report no.:||CrystEngComm||Abstract:||There are very important characteristics of partial substitution of the cations at both A and B sites in ABO3 perovskite structure. In this report, SrFeO(3−δ) (SFO) photocatalyst powder was synthesized by a high temperature solid state reaction method. The morphology and crystalline structure of the obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscopy (TEM). The XRD, TEM and SAED patterns indicated that a single cubic perovskite phase of SrFeO(3−δ) (SFO) oxide has been successfully synthesized. The surface composition of the SrFeO(3−δ) sample was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results showed that the iron existing in the SrFeO(3−δ) perovskite structure is composed of a mixture of Fe3+ and Fe4+. Due to the high absorbance of the SrFeO(3−δ) powder, the Kubelka–Munk model and UV–visible measurement were not applicable. Therefore, in order to study the band positions further, the valence band edges for electronic band gaps were obtained for SrFeO(3−δ) by ultraviolet photoelectron spectroscopy (UPS) while the conduction band position was obtained by photovoltage method.||URI:||https://hdl.handle.net/10356/95267
|ISSN:||1466-8033||DOI:||http://dx.doi.org/10.1039/c2ce25751c||Rights:||© 2012 The Royal Society of Chemistry.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||EEE Journal Articles|
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