Ilan Gur, Neil A. Fromer, Chih-Ping Chen, Antonios G. Kanaras, and,

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Presentation transcript:

Ilan Gur, Neil A. Fromer, Chih-Ping Chen, Antonios G. Kanaras, and, Hybrid Solar Cells with Prescribed Nanoscale Morphologies Based on Hyperbranched Semiconductor Nanocrystals Ilan Gur, Neil A. Fromer, Chih-Ping Chen, Antonios G. Kanaras, and, A. Paul Alivisatos Kyle Braam, EE235 Presentation, 3/2/09

Donor/Acceptor Heterojunction Organic Solar Cells Donor Materials CuPc P3HT Acceptor Materials Perylene C60 Fullerene derviatives (PCBM) This Paper: P3HT/CdSe Solar Cell poly-3-hexylthiophene

Solar Cell Structure

CdSe/P3HT Solar Cell P3HT Polymer Matrix Branched CdSe Nanoparticles TEM OF CdSe Nanoparticle Scale bar: 100 nm

Hyperbranched vs. Rod

Results: IV Properties

Results: Best Solar Cell Highest efficiency device: 2.18% P3HT Polymer Matrix CdSe Nanoparticle Polymer unable to fully penetrate the branches of the individual nanocrystals More open branching networks Size of nanoparticles