Some of the technical problems that appear are obtaining solar cell parameters from I-V curve measurement data. One simple\nmethod is using linear graphical fit at zero current or voltage conditions. Although the accuracy of the obtained values is\nacceptable, other problems may arise regarding the number of parameters which could be obtained. We report a comparison\nbetween manual or graphical fit and fit using Shockley�s equation. The single I-V curve under the lighting was inferred to obtain\nthe intrinsic parameters of the solar cells� performance. The fittings were performed using the nonlinear equation of Shockley by\ndetermining some initial values of fittings such as Rs, Rsh, n, I0, Iph, and T. In the case of the Shockley equation fit, the iteration\nwas performed several times to obtain the least possible inferred parameters. We have successfully obtained a better result of\nnonlinear Shockley fitting compared to the manual linear fit.
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