Polymer Solar Cells That Use Self-Assembled-Monolayer- Modified ZnO/Metals as Cathodes


  • This work was supported by the National Science Foundation's NSF-STC program under DMR-0120967 and the DOE's “Future Generation Photovoltaic Devices and Process” program. A.K.Y.J. thanks the Boeing–Johnson Foundation for financial support. H.L.Y. thanks the Intel Foundation PhD Fellowship and the Nanotechnology Fellowship sponsored by the University Initiative Fund (UIF) from the Center for Nanotechnology at the University of Washington.


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A simple solution-deposition method is developed to fabricate polymer solar cells that comprise a SAM-modified ZnO/metal bilayer cathode. The contact properties between the ZnO and metal can be enhanced by interfacial modification with a series of carboxylic acid-based dipolar SAMs. This finding provides a new strategy for very effective contact engineering in organic optoelectronic devices.