CdSe nanorods dominate photocurrent of hybrid CdSe-P3HT photovoltaic cell.
Photovoltaic devices based on organic semiconductors require charge-separating networks (bulk heterojunctions) for optimal performance. Here we report on the fabrication of organic-inorganic photovoltaic devices with tailored (n-type) CdSe nanorod arrays aligned perpendicularly to the substrate. The nanorod lengths varied from 58 ± 12 to 721 ± 15 nm, while the diameters and inter-rod spacings were kept constant at 89.5 ± 7.5 and 41.3 ± 9.9 nm, respectively. Short-circuit densities improved linearly with nanorod length, resulting in power conversion efficiencies of up to 1.38% for cells with nanorods 612 ± 46 nm long. Notably, the cell's efficiency was dominated by exciton generation in the CdSe nanorods.
Schierhorn
Martin
M
Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States.
Boettcher
Shannon W
SW
Peet
Jeffrey H
JH
Matioli
Elison
E
Bazan
Guillermo C
GC
Stucky
Galen D
GD
Moskovits
Martin
M