Series resistance as a function of current and its application in solar cell analysis 37th IEEE photovoltaic specialists conference

The series resistance of a solar cell varies with its operating conditions. However, most solar cell characterization is done by assuming the series resistance is represented as a constant value. This paper presents the application of the multi light method to extract R_s-light and R_s-dark as a function of current. Application of R_s(J) to analysis of solar cell is demonstrated by extracting the R_s-corrected J-V curve. This allows evaluation of the p-n junction without the parasitic R_s effects. Since the R_s(J) and R_s-corrected J-V data is measured in high detail, the total losses from the R_s and the pseudo efficiency can be measured without need of curve fitting. Finally, by including R_s(J) to the modelling of solar cells, errors in parameterization caused by variation in R_s value is eliminated.