A study on the fabrication of externally connected module by equivalent circuit analysis of optimized dye-sensitized solar cell

In this study, we attempted an external connection of dye-sensitized solar cells for large scaling, contrary to conventional modules of grid type. Generally, it is well known that series connection is effective but parallel connection cause decrease of efficiency in case of external connection. This is the main reason why researchers avoid external connected module. We proved it by equivalent circuit analysis of dye-sensitized solar cell and made up externally series-parallel connected module as a DC power source. It is difficult to make up practical solar module by only series connection because of extremely low current. Therefore, we make a proper voltage from series connection and a current from parallel connection of dye-sensitized solar cell module without current loss using that analysis. Finally, we made 8V-0.25A large module of series-parallel connected dye-sensitized solar cell based on equivalent circuit analysis.