1. 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

2. 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

3. Solar Cell Structure

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

5. Hyperbranched vs. Rod

6. Results: IV Properties

7. 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