Using multimeter I measured the output voltage and output current while exposing in sunlight. I can't able to find the fill factor using that. We have an electrochemical workstation with us. How to calculate the fill factor of the solar cell?
Adding to the above, from the principle point of view there is no difference for measuring the I-V characteristic of any solar cell. They are two terminal devices. They have an anode and a cathode and you measure their terminal characteristics. The solar cells operate in the Fourth quadrant of the I-V diagram when they are illuminated. To get the fill factor you have to scan the whole I-V curve from the short circuit to open circuit conditions by connecting variable resistive load between the anode and he cathode.
In DSSC as a photoelectrochemical cell, it has a working electrode , which is the photo electrochemical electrode, a counter electrode and may have reference electrode. The reference electrode i used when determining the characteristics of the electrodes. An electrochemical electrode constitutes a half cell. The cell is composed of the working and the counter electrode.
These are just basic definitions to put things into order as we follow the concept: you measure as you define.