Interface engineering of graphene for universal applications as both anode and cathode in organic photovoltaics
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Kong_Interface engineering.pdf
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1.9 MB
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Author(s)
Park, Hyesung
Chang, Sehoon
Smith, Matthew
Gradecak, Silvija
Kong, Jing
Date Issued
April 2013
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Park, Hyesung, Sehoon Chang, Matthew Smith, Silvija Gradečak, and Jing Kong. “Interface Engineering of Graphene for Universal Applications as Both Anode and Cathode in Organic Photovoltaics.” Sci. Rep. 3 (April 2, 2013).
Version
Final published version
Abstract
The high transparency of graphene, together with its good electrical conductivity and mechanical robustness, enable its use as transparent electrodes in optoelectronic devices such as solar cells. While initial demonstrations of graphene-based organic photovoltaics (OPV) have been promising, realization of scalable technologies remains challenging due to their performance and, critically, poor device reproducibility and yield. In this work, we demonstrate by engineering the interface between graphene and organic layers, device performance and yield become close to devices using indium tin oxide. Our study confirms that the key issue leading to the poor performance or irreproducibility in graphene-based OPV originates from the graphene interface, and can be addressed by a simple interface modification method introduced in this work. We also show similar approach allows graphene to be used as cathode in inverted OPV geometry, thereby demonstrating the universal application of graphene as transparent conductors for both the anode and cathode.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 Unported License
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DOI of Published Version
https://doi.org/10.1038/srep01581
