Project cost ($):
2 days to prepare, 1 hour for experiment
Access to your school's science lab is required
Handle chemicals with care. Proper laboratory gear/gloves should be worn. Ensure that chemicals are properly disposed of.
Table of Contents
This experiment was done to compare the efficiency of dye-sensitized solar cells with normal silicon based solar cells.
Silicon based solar cells are more efficient than normal silicon based solar cells, and are therefore able to produce more power, with the same amount of light.
Dye-sensitized solar cell
When light photons reach the dye molecules, if there is enough energy, they will release an electron to the titanium dioxide. From there the electron will reach the anode plate. The dye molecule will obtain an electron from the iodide electrolyte. This process will oxidize the iodide into triiodide. The triiodide will recover the electrons through the returning current via the platinum plate at the bottom.
Dye-sensitized solar cell, tin dioxide, fluorine, photosensitive, titanium dioxide, light photons, iodide, tri-iodide
The materials required for this science fair project:
1. For this experiment, the independent variable is the type of solar cell, a dye-sensitized solar cell or a silicon based solar cell. The dependent variable is the open circuit voltage and short circuit current of the solar cells. This is determined by measuring the voltage and current (amperes). The constants (control variables) are the dimensions of the solar cell, the use of raspberry juice and the amount of sunlight.
c. Prepare the second glass plate by cleaning it with ethanol. Again, determine the conductive side by using the multimeter. On the conductive surface, use a pencil to coat the surface with a layer of carbon.
3. Connect the dye-sensitized solar cell as shown in figure 2 and place it under the sunlight. Measure the open circuit voltage using the voltmeter and short circuit currents using the ammeter. Record the measurements in the table below.
The results show that the silicon based solar cell has a higher open circuit voltage and short circuit current compared to the dye-sensitized solar cell.
The hypothesis that silicon based solar cells are able to produce more power is proven to be true.
The experiment can be repeated by using different fruit juices such as blueberry or cranberry juice.
Dye sensitized solar cell - http://en.wikipedia.org/wiki/Dye-sensitized_solar_cell