Graphical method for the evaluation of series resistance in solar cells.

A graphical method for the evaluation of series resistance (R[sub s]) has been proposed after solving the dark and illuminated current-voltage equations for junction solar cells. The design of an electronic circuit has been described to obtain ideal open and short circuit conditions and the measurement of R[sub s] has been reported for a few diffused junction silicon solar cells as a function of illumination level up to ∼ 2 sun. It has been found that the series resistance decreases sharply with intensity of incident radiations up to ∼ 1 sun and it saturates with further increase of intensity. [ABSTRACT FROM AUTHOR]