raspberry solar cells ben taylor interdisciplinary education group university of wisconsin-madison
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Raspberry Solar Cells
Ben TaylorInterdisciplinary Education GroupUniversity of Wisconsin-Madison
ENERGY?
ENERGY?
Electricity
ENERGY?
ElectronsElectricityElectricityElectrons
ENERGY?Electricity
CATHODE (+)
BARRIER
ANODE (-)
BARRIER
ANODE (-)
CATHODE (+)
ANODE (-)
CATHODE (+)
BARRIER
A Carbon-Based Solar Cell2D-Graphene 1D-Carbon Nanotubes
• Strongest material known– Carbon nanotubes are 300 times stronger than steel.
• Exceptional electronic properties – Grow metallic and semiconducting.– 1000 times more conductive than copper.– We can use carbon nanotubes to absorb light and
generate electricity!
How do the Layers in a Solar Cell Work?
CNTs
C60
Raspberry/TiO2 Carbon NanotubesMaterial Function
JuiceAsh
Light Absorber
Charge Extraction
Charge Extraction
Electrode
+
-
+
-
TiO2
Glass
Glass
Silicon (25%)
CNTs (1%) Arnold Group
Raspberry (0.5-1%)
Technology First Report >1% Efficiency Time
Silicon 1941 1952 11 years
Polymer 1950s 1986 ≈35 years
CNTs 2009 2013 4 years
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