Design of a thin film double junction photovoltaic cell and performance analysis by software simulation

The use of distributed energy resources is increasingly being pursued as a supplement and alternative to larger conventional central power stations. Nowadays solar energy becomes an important alternative source of energy since it is highly reliable and has no environmental impact. Photovoltaic (PV) technology converts the solar or light energy into electrical energy and has no moving parts, no consumption of conventional fossil fuels and lasting for many years with very little maintenance. This paper described the design process of a thin film double junction photovoltaic cell. Multi junction solar cell has the advantage to use the different wavelength in converting to electric energy. In this case, short circuit current increases dramatically. Here the designed double junction cell has the short circuit current density, J_sc is 46.1 mA/cm² and the performance of the cell is simulated via PC1D software and the efficiency of the solar cell is 28.6% found.