Abstract
A numerical simulation study of a Tandem solar cell is presented. The parameters of single and two-diodes lumped-circuit model are usually the saturation current, the series resistance, the ideality factor, the shunt resistance and the photocurrent. It is found that the influence of the distributed series resistance on electrical characteristics can be described numerically by the application of the two models to Tandem organic solar cells. A description of the efficiency, fill factor, open circuit voltage and short circuit current on the devices are marked with series resistance, temperature and ideality factor. This approach allows one to obtain a set of parameters which is reasonable and representative of the physical system.
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