SOPHIA partners develop a new 2D model for the electrical potential in a cell stripe in thin-film solar modules including local defects
SOPHIA partners from Forschungszentrum Jülich have developed a new 2D model for a cell stripe based on the superposition of several analytical expressions that can compute in a matter of seconds the potential distribution in a cell stripe in the presence of local defects (shunts).
The study, published on the Progress in Photovoltaics: Research and Applications Journal demonstrates that the accuracy of the semi-analytical model is satisfactory for a solar cell under typical operation conditions. The model uses a linearization of the solar cell current/voltage characteristics and takes the sheet resistance of one electrode into account. The second electrode is assumed to be a perfect conductor. The new model computes the potential distribution in a cell stripe in the presence of local defects.
The performance of solar modules is strongly influenced by the presence of local defects (shunts) in the module. Modelling cell stripes with local defects requires at least a 2D model. Most works on such 2D models are based on the numerical solution of the involved differential equations.
The model is freely available here.
The full study is available here.
For further information, please contact Bart E. Pieters