Abstract. An accurate estimation of solar cell and module parameters from current-voltage data is essential to study the behavior of the solar cell device and optimize their performance. In this work a simple, accurate and fast approach is presented to estimate the five parameters of the single diode equivalent solar cell/module using the measured current-voltage data and its derivative (G = dI / dV). These parameters are the photocurrent (I_ph), ideality factors (n), saturation current (I_s), series and shunt resistance (R_s, R_sh). A nonlinear least-square technique based on the Newton-Raphson and Lambert W-function method under MATLAB Program is applied to different solar cell technologies, including Mono-Si, Poly-Si, and organic solar cell based on TiO₂ anatase and rutile nanocrystal under different environmental conditions.

Key words: solar energy, parameters extraction, organic-inorganic SCs, I-V characteristics.