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The implementation of a different approach for the estimation of the maximum photo-generated current density I max) regarding internal parameters of the cell and its optical performance was performed introducing an effective optical pathlength enhancement factor, Z(X). Different PV devices were considered, including dssc, under the world reference and averaged local spectra estimated for the Atacama Desert, under air masses equal to 1.5 and 1.08, respectively. This model was successfully implemented to predict J,, with higher reliability which makes it suitable to be applied to any type of solar cell developed or simulated.