A solar cell parameter extraction method based on explicit equations

A solar cell parameter extraction method based on explicit equations, based on first point of the short circuit current, open-circuit voltage and Lambertw point function, simplified equation of the current output parameters of the solar cell 5 containing only the ideality factor, and series resistors in parallel with three parameters current Lambertw significant output equations, and the obtained photocurrent and the reverse saturation current analytical expression; much larger than the photocurrent of the solar cell using a reverse saturation current and other three boundary conditions, a simplified order differential equation derivation equation 5 the current output parameters; Secondly, in conjunction with the short-circuit point slope and experimental data at the maximum power point of the solar cell in solving the ideality factor, the parallel resistance and serial resistance value; Finally, the three parameter values ​​are substituted into the photocurrent and the reverse saturation current analytical expressions obtained photocurrent and the reverse saturation current value. Technical effects of the invention are: a single solar cell under illumination by the excitation curve, high precision can be extracted five solar electric parameter.