Artículos de revistas
New explicit current/voltage equation for p-i-n solar cells including interface potential drops and drift/diffusion transport
Fecha
2014-08Registro en:
Taretto, Kurt Rodolfo; New explicit current/voltage equation for p-i-n solar cells including interface potential drops and drift/diffusion transport; Wiley Blackwell Publishing, Inc; Progress In Photovoltaics; 22; 8; 8-2014; 870-884
1062-7995
1099-159X
Autor
Taretto, Kurt Rodolfo
Resumen
Analytical modeling of p-i-n solar cells constitutes a practical tool to extract electronic material and device parameters from fits to experimental data and to establish optimization criteria. This paper proposes a model for p-i-n solar cells based on a new approximation, which estimates the electric field taking into account interface potential drops at the intrinsic-to-doped interfaces. This leads to a closed-form current/voltage equation that shows very good agreement with device simulations, revealing that the inclusion of the interface potential drops constitutes a major correction to the classical uniform-field approach. Furthermore, the model is able to fit experimental current/voltage curves of efficient nanocrystalline Si and microcrystalline Si p-i-n solar cells under illumination and in the dark, obtaining material parameters such as mobility-lifetime product, built-in voltage, or surface recombination velocity.