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Dye Sensitized Solar Cells

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by

Hannah Rose

on 6 December 2013

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Transcript of Dye Sensitized Solar Cells

Dye Sensitized Solar Cells
What are dye sensitized
solar cells?
Carbon Nanotubes
Dye Sensitized Solar Cells in the Real World
How it Works
Glass protects cell
Transparent Conducting Oxide carries current/transmits light
Dye absorbs light
Electrolyte uses absorbed light to generate a current
Platinum acts as a catalyst for the energy conversion
Titanium dioxide nano-particles are used as semiconductors
Dye Sensitized Solar Cells
Dye Sensitized Solar Cells (DSSCs) are a type of solar cell that can be made using components cheaper than conventional solar cells
Carbon Nanotubes in DSSCs
Carbon nanotubes are used as transparent electrodes in solar cells
Transparency is necessary in many solar cell components in order for the cell to work
Problems with Carbon Nanotubes
Lower efficiency than more conventional indium tin oxide electrodes
Sometimes the charge-carriers in the nanotubes recombine with ions in the dye
This has been solved by placing a thin layer of titanium oxide between the nanotubes and the dye
Nanotubes are not quite transparent
Pros for Carbon Nanotubes
Traditional indium tin oxide electrodes can account for 60% of the solar cell cost- replacing them makes solar cells much cheaper
While not completely transparent, the nanotubes are more so than other electrodes
Stronger and more flexible than indium tin oxide electrodes
Efficiency
Silicon-based solar cells usually reach about 15% efficiency
Dye sensitized solar cells have reached 11-15% efficiency in various designs
Cost
Silicon solar cells' lowest retail cost is about $1.06, but average cost is higher
Dye sensitized solar cells' could be sold for as little as $.75-$1.00
Aesthetic Appeal
Standard Solar Cells
Come in a limited amount of colors
Cannot be patterned
Opaque
Carbon vapor depostition
Currently nonrenewable materials are used
Carbon based oils
Eucalyptus
Palm
Olive
Synthesis
Dye sensitized solar cell diagram
Dye Sensitized Solar Cells
Come in many colors
Can be patterned
Transparent
Full transcript