The Columbia EFRC - Lenfest Center for Sustainable Energy ...
The Columbia EFRC - Lenfest Center for Sustainable Energy ...
The Columbia EFRC - Lenfest Center for Sustainable Energy ...
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Carbon-based Conductor and Semiconductors.<br />
Philip Kim<br />
Tony Heinz<br />
With Ioannis Kymissis, Charles Black (BNL), Ken Shepard.<br />
Conventional solar cells need work<br />
functions matched to materials.<br />
Simplified band diagram (shown at V oc) of a P3HT:PCBM solar cell<br />
having PEDOT and Al contacts.<br />
Band offsets are major source of loss!<br />
Graphene work function is controllable through<br />
chemical doping and through applied electric fields.<br />
Program Goal: Develop carbon-based electrode structures <strong>for</strong> high<br />
efficiency charge extraction from nanostructured heterojunction devices.<br />
file: <strong>Lenfest</strong> Symp 05-04-10 rev b.ppt Page 23
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