Model dielectric functional of amorphous materials including Urbach tail

Martin Foldyna; Kamil Postava; J. Bouchala; Jaromir Pistora; Tomuo Yamaguchi

doi:10.1117/12.560673

7 April 2004 Model dielectric functional of amorphous materials including Urbach tail

Martin Foldyna, Kamil Postava, J. Bouchala, Jaromir Pistora, Tomuo Yamaguchi

Proceedings Volume 5445, Microwave and Optical Technology 2003; (2004) https://doi.org/10.1117/12.560673
Event: Microwave and Optical Technology 2003, 2003, Ostrava, Czech Republic

Abstract

A generalization of the Tauc-Lorentz model dielectric function of amorphous semiconductors and dielectrics is presented in which the exponential Urbach tail is included. The generalized parameterization of the optical functions includes only six fitting parameters. The real part of the dielectric function is calculated using analytical Kramers-Kronig dispersion relations. The model is applied to hydrogenated amorphous silicon.

Citation Download Citation

Martin Foldyna, Kamil Postava, J. Bouchala, Jaromir Pistora, and Tomuo Yamaguchi "Model dielectric functional of amorphous materials including Urbach tail", Proc. SPIE 5445, Microwave and Optical Technology 2003, (7 April 2004); https://doi.org/10.1117/12.560673

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