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Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method
นักวิจัย : Ghaffari, Mohammad , Huang, H. , Tan, Ooi Kiang , Shannon, Mark
คำค้น : DRNTU::Engineering::Electrical and electronic engineering.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : 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. , 1466-8033 , http://hdl.handle.net/10220/10820 , http://dx.doi.org/10.1039/c2ce25751c
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : CrystEngComm
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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.

บรรณานุกรม :
Ghaffari, Mohammad , Huang, H. , Tan, Ooi Kiang , Shannon, Mark . (2555). Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ghaffari, Mohammad , Huang, H. , Tan, Ooi Kiang , Shannon, Mark . 2555. "Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ghaffari, Mohammad , Huang, H. , Tan, Ooi Kiang , Shannon, Mark . "Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Ghaffari, Mohammad , Huang, H. , Tan, Ooi Kiang , Shannon, Mark . Band gap measurement of SrFeO3−δ by ultraviolet photoelectron spectroscopy and photovoltage method. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.