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Metal oxide buffer layer for improving performance of polymer solar cells |
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| Authors: | Zhouying Zhao Nikhil Koratkar Pradeep Haldar |
| Affiliation: | a College of Nanoscale Science and Engineering, University at Albany, State University of New York, 255 Fuller Road, Albany, NY 12203, USA b Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, NY 12180, USA c Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, NY 12180, USA |
| Abstract: | We report the application of aluminum doped ZnO (ZnO:Al) layer as a buffer on ITO glass for fabrication of non-inverted polymer solar cells. The ZnO:Al thin film was deposited using DC magnetron sputtering, with the thickness being varied from 23 to 100 nm. The devices showed most discernible improvements in their efficiencies when a thin layer of ZnO:Al film of thickness ∼40 nm was introduced. The observed enhancement in short circuit current density and open circuit voltage is likely attributed to the role of the ZnO:Al film as an optical tuner and an interfacial diffusion barrier. The result suggests that a metal oxide layer inserted between ITO and polymer layers can be a route for improving both efficiency and stability of polymer solar cells. |
| Keywords: | ZnO Metal oxide Optical tuner Buffer Polymer solar cells |
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