Search

Analysis of solar cell current-voltage (I-V) characteristics and spectral response data are essential for determining the key device parameters during cell research and development. Several methods for testing and analysis of solar cell characteristics have been developed with varying degrees of automation. In most cases these methods involve a minimisation procedure to determine the I-V and spectral response curve parameters from experimental data. However, the majority of these methods usually give different results from each other and lead to incorrect or physically impossible values for some parameters, because of poor starting values. In this paper the determination of solar cell parameters from experimental data of the illuminated I-V characteristic using a two-exponential equation is considered. The approach used here is based on a simultaneous equation method, as one of the more appropriate means for the numerical analysis of the I-V curve, in order to gain good starting values.