Absorption coefficient modeling of microcrystalline silicon thin film using Maxwell-Garnett effective medium theory

作者：Chen Sheng Hui^*; Wang Hsuan Wen; Chang Ting Wei

来源：Optics Express, 2012, 20(6): A197-A204.

DOI：10.1364/OE.20.00A197

Considering the Mott-Davis density of state model and Rayleigh scattering effect, we present an approach to model the absorption profile of microcrystalline silicon thin films in this paper. Maxwell-Garnett effective medium theory was applied to analyze the absorption curves. To validate the model, several experimental profiles have been established and compared with those results from the model. With the assistance of the genetic algorithm, our results show that the absorption curves from the model are in good agreement with the experiments. Our findings also indicate that, as the crystal volume fraction increases, not only do the defects in amorphous silicon reduce, but the bulk scattering effect is gradually enhanced as well.

• 出版日期2012-3-12
• 单位中央民族大学