Present article deals with analysis of output characteristics in ZnO based Dye Sensitised Solar Cell (DSSC) using a Lambert W - function technique and MATLAB Simulation. We have used an analytical approach having no approximation for extracting various parameters of DSSC, a well known LambertW-function technique. The model used in present work is single diode model including the capacitance in equivalent circuit and hence study its effect on current-voltage characteristics and other DSSC parameters. Results hence obtained are discussed and validated using MATLAB Simulation.