Amorphous Phase Influence on the Optical Bandgap of Polysilicon

Abstract

The Effective Medium Approximation (EMA) is a usual method for estimating the dielectric response of a mixture (in our case polycrystalline silicon). From the n and k spectra (calculated with this method) it is possible to evaluate the value of the optical bandgap of this material by models of Tauc and Cody taking into account that the material is noncrystalline.