3D MODELING OF A REVERSE CELL MADE WITH IMPROVED MULTICRYSTALLINE SILICON-WAFERS

The spectral response, short-circuit photocurrent and conversion effic iency of a reverse cell made with multicrystalline silicon wafers have been computed taking into account different values of base thickness, grain size, grain boundary recombination velocity, front and back sur face recombination velocities and minority carrier diffusion length in the grains. The results are compared to those of a conventional multi crystalline cell computed under the same conditions. It is shown that the reverse cell structure, which simplifies the technological problem s, particularly those related to the conventional emitter and front gr id, could be a good alternative solution in the case of improved thin wafers.