21 February 2012 Exact field solution to guided wave propagation in lossy thin films
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Abstract
The problem of light trapping in thin film solar cells is one of mode coupling into a lossy waveguide structure. This paper therefore derives the full-field solution for electromagnetic wave propagation in a three-layer dielectric system with arbitrary complex indices of refraction. The functional form of the eigenvalue equation is identical to that of the strictly lossless case, but with complex-valued propagation constants rather than real. Lossy mode propagation is then explored in the context of photovoltaics by modeling a thin film solar cell made of amorphous silicon with an aluminum back contact.
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James R. Nagel, James R. Nagel, Steve Blair, Steve Blair, Michael A. Scarpulla, Michael A. Scarpulla, } "Exact field solution to guided wave propagation in lossy thin films", Proc. SPIE 8256, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices, 825606 (21 February 2012); doi: 10.1117/12.910168; https://doi.org/10.1117/12.910168
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