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Proceedings Paper

Synthesis and optical properties of the (La, Mn)-codoped BiFeO3 films on n+-Si(100) substrates
Author(s): J. Z. Zhang; T. Huang; Y. W. Li; Z. G. Hu; X. J. Meng; J. H. Chu
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Paper Abstract

La-doped BiFe0.92Mn0.08O3 films with the composition from 0 to 20% (BLFMx) have been deposited on Si(100) substrates by a sol-gel route. X-ray diffraction analysis shows that the films are polycrystalline and exhibit the pure perovskite phase structure (R3c). The La dopant effects on the surface morphology, dielectric function, and optical transition of the films have been investigated by atomic force microscopy and spectroscopic ellipsometry at room temperature. The dielectric functions of the films have been uniquely extracted by fitting the measured ellipsometric spectra with a three phase layered model (air/film/Si) and the Tauc-Lorentz dielectric function model in the photon energy range of 0.5-3.5 eV. It is found that the optical transitions decrease with increasing La composition, which is crucial for future photoelectric device.

Paper Details

Date Published: 16 December 2013
PDF: 5 pages
Proc. SPIE 9068, Eighth International Conference on Thin Film Physics and Applications, 90680A (16 December 2013); doi: 10.1117/12.2052992
Show Author Affiliations
J. Z. Zhang, East China Normal Univ. (China)
Shanghai Institute of Technical Physics (China)
T. Huang, East China Normal Univ. (China)
Y. W. Li, East China Normal Univ. (China)
Z. G. Hu, East China Normal Univ. (China)
X. J. Meng, Shanghai Institute of Technical Physics (China)
J. H. Chu, East China Normal Univ. (China)
Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 9068:
Eighth International Conference on Thin Film Physics and Applications
Junhao Chu; Chunrui Wang, Editor(s)

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