Artículos de revistas
Accurate explicit equations for the fill factor of real solar cells:Applications to thin-film solar cells
Fecha
2012-06-14Registro en:
Taretto, Kurt Rodolfo; Soldera, Marcos Maximiliano; Troviano, Mauricio Eduardo; Accurate explicit equations for the fill factor of real solar cells:Applications to thin-film solar cells; John Wiley & Sons Ltd; Progress In Photovoltaics; 21; 7; 14-6-2012; 1489-1498
1062-7995
Autor
Taretto, Kurt Rodolfo
Soldera, Marcos Maximiliano
Troviano, Mauricio Eduardo
Resumen
Even within the simplest real solar cell model, the exact value of the fill factor (FF) is only computable by numerical calculations. Here, we perform approximations to the power-voltage curve given by the one-diode model with series and shunt resistance losses, obtaining explicit expressions for the voltage and current at the maximum power point, and thus an explicit approach for the FF. Over a broad range of possible solar cell parameters, including cells where the impact of shunt losses on the fill factor is not negligible, the approximate equations yield relative errors typically around 1%. The equations are applied to explore the dependence of FF on alternative buffer material thickness of organic solar cells, and to investigate the incidence of shunt and series resistance losses on the FF of Cu (In,Ga) Se2 solar cells under indoor illumination conditions.