A new method for evaluating illuminated solar cell parameters
Abstract
A new method to evaluate the five illuminated solar cell parameters (series resistance R_{s}, the ideality factor n, the photocurrent I_{ph}, the shunt conductance G_{sh} and the diode saturation current I_{s}) is described. The method uses the measured currentvoltage data and the resulting calculated conductance of the device. By using the conductance, the number of parameters which has to be calculated is reduced and then only four parameters have to be extracted. A nonlinear least squares optimization algorithm based on the Newton model is hence used to evaluate these parameters. To overcome the difficulty in initializing the cell parameters, the simple conductance technique is used. When incorporated into microcomputerbased data acquisition software, the program allows theoretical modeling of solar cells. Results obtained for a commercial solar cell and a module are given. Comparison with other commonly used methods is also discussed.
 Publication:

Solid State Electronics
 Pub Date:
 February 2001
 DOI:
 10.1016/S00381101(00)00277X
 Bibcode:
 2001SSEle..45..293C