Exploring the Photo-Electrochemical Processes of the Parallel Connected DSSCs in Indoor Conditions

In this work, the electrochemical impedance of a single dye sensitized solar cell (DSSC) and two parallel connected DSSCs were analyzed. The photo-electrochemical processes of parallel connected DSSCs under indoor light illumination were highlighted. Even if DSSCs did not have identical photovoltaic parameters after the fabrication process, the parallel connection determined “the harmonization”, behaving almost like two identical cells characterized by the similar electron transfer processes. The lack of a competition between the photovoltaic efficiencies of DSSCs connected in parallel at the expense of DSSC with better efficiency, and more, maintaining the highest efficiency, can open a new perspective in the implementation of DSSCs in electronic packaging devices for indoor conditions.