Investigation of properties for dye-sensitized solar cells in series-parallel connection modules

摘要

Dye-sensitized solar cell (DSSC) is the third generation photovoltaics cell that efficiently converts visible light into electrical energy, and was proposed as low cost alternative to conventional solar cell of silicon. In addition, DSSCs were used to modularize the product by 3D printing. We used good conductive copper foil with a series-parallel combination tape to decrease contact resistance. Finally, we encapsulated the DSSCs and then measured the current density-voltage curves of DSSCs. Higher voltage and current were observed. Moreover, the best photovoltaic conversion efficiency (e) of the single DSSC is 3.71%, but that of DSSCs in series-parallel is decreased to 3.50%. The reason of decrease is due to contact resistance. Therefore, the phenomenon is investigated by electrochemical impedance spectrometer (EIS) for internal impedances with an equivalent circuit model.