Characterization and Performance of BSF, p exp + Nn exp + , Silicon Concentrator Solar Cells

摘要

Performance data on silicon BSF solar cells have indicated such devices are viable for concentrator systems. Conversion efficiencies have been measured for these cells above 18% at 25 suns. An experimental and theoretical investigation using a charge control model of the characteristics of p exp + nn exp + , BSF solar cells fabricated at Sandia Laboratories is described. Measurements of the internal quantum efficiency, performance in concentrated sunlight, dark current-voltage characteristics, and data on test devices are used with the model and device code calculations to characterize cell behavior, to further substantiate the theoretical approach and evaluation of physical parameters, and to indicate present limitations on cell performance. (ERA citation 05:006723)