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Proceedings Paper

Temperature dependence of optical properties in Sn0.925Mn0.075O2 film determined by transmittance spectra
Author(s): W. J. Zhang; W. L. Yu; K. Jiang; Z. G. Hu
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Paper Abstract

Near-infrared-ultraviolet optical properties of Sn0.925Mn0.075O2 (SMO) film grown on c-plane sapphire substrate have been investigated by the transmittance spectra in the photon energy of 0.45-6.5 eV (190-2650 nm) from 5.3-300 K. The optical constants have been extracted by fitting the experimental data with the Adachi's model. The optical band gap of the film can be estimated from the relation (αE)2proportional to(hυ-Eg). It is found that the absorption edge shifts to a lower energy side with increasing the temperature and the band gap Eg decreases from 3.80 to 3.72 eV. The parameters αB and θB of the Bose-Einstein model are 45.4 meV and 221.8 K, respectively, which could be ascribed to the thermal expansion of crystal lattice and the carrier-phonon interaction. The band narrowing coefficient dEg/dT of the SMO film is estimated to be -3.92x10-4 eV/K at room temperature.

Paper Details

Date Published: 18 February 2011
PDF: 4 pages
Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 79950X (18 February 2011); doi: 10.1117/12.888311
Show Author Affiliations
W. J. Zhang, East China Normal Univ. (China)
W. L. Yu, East China Normal Univ. (China)
K. Jiang, East China Normal Univ. (China)
Z. G. Hu, East China Normal Univ. (China)

Published in SPIE Proceedings Vol. 7995:
Seventh International Conference on Thin Film Physics and Applications
Junhao Chu; Zhanshan Wang, Editor(s)

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