X-ray Photoemission Spectroscopy Studies of the Semiconducting Molybdenum Purple Bronze Bi0.2MoO3

J Mater Sci Technol ›› 2006, Vol. 22 ›› Issue (04): 487-490.

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X-ray Photoemission Spectroscopy Studies of the Semiconducting Molybdenum Purple Bronze Bi0.2MoO3

Rui XIONG, Chang LUO, Wufeng TANG, Jing SHI

Department of Physics, Wuhan University, Wuhan 430072, China...

Received:2005-06-07 Revised:2005-08-08 Online:2006-07-28 Published:2009-10-10
Contact: Rui XIONG

Abstract

Abstract: The electronic structure of the quasi-two-dimensional (2D) semiconducting molybdenum purple bronze Bi0.2MoO3 was presented by X-ray photoemission spectroscopy. The valence band of Bi0.2MoO3 is made up of Opπ non-bonding level, π and σ bonding bands. The peak at 1.5 eV and the shoulder at 0.5 eV in the forbidden band may be formed from the non-bonding dxy orbitals of some Mo atoms. The O1s core-level spectrum demonstrates the presence of two inequivalent bonds of oxygen ions in Bi0.2MoO3. Bi4f core-level spectrum shows two bonding characters of Bi atoms in bismuth molybdenum single crystal. Mo3d core-level spectrum confirms two kinds of valence states of Molybdenum (Mo+5 and Mo+6). Ar+ ion irradiation induces more significant distortion of MoO6 octahedra.

Key words: Bi0.2MoO3 single crystal, X-ray photoemission spectroscopy, Core-electron spectrum

Rui XIONG, Chang LUO, Wufeng TANG, Jing SHI. X-ray Photoemission Spectroscopy Studies of the Semiconducting Molybdenum Purple Bronze Bi0.2MoO3[J]. J Mater Sci Technol, 2006, 22(04): 487-490.

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X-ray Photoemission Spectroscopy Studies of the Semiconducting Molybdenum Purple Bronze Bi0.2MoO3

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