Ferroelectric nanodot formation from spin‐coated poly(vinylidene fluoride‐co‐trifluoroethylene) films and their application to organic solar cells |
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Authors: | Ji‐Won Seo Moonkyu Park Haemin Paik Jung‐Yong Lee Jongin Hong Kwangsoo No |
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Affiliation: | 1. Graduate School of EEWS, KAIST Institute for the Nano Century, KAIST, Daejeon, Korea;2. Department of Materials Science and Engineering, KAIST, Daejeon, Korea;3. Department of Chemistry, Chung‐Ang University, Seoul, Korea |
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Abstract: | We demonstrated a facile route to the preparation of self‐assembled poly(vinylidene fluoride‐co‐trifluoroethylene) P(VDF‐TrFE)] nanodots from spin‐coated thin films. We found that the initial film thickness would play an important role in the formation of such P(VDF‐TrFE) nanodots. Interestingly, the electric dipoles of such nanodots were self‐aligned toward the bottom electrode and their ferroelectric properties were determined by using piezoresponse force microscopy. In addition, the self‐polarized ferroelectric nanostructures were introduced to small molecular organic photovoltaic devices and allowed for enhancing the short circuit current density (Jsc) from 9.4 mA/cm2 to 10.2 mA/cm2 and the power conversion efficiency from 2.37% to 2.65%. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41230. |
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Keywords: | coatings films morphology surfaces and interfaces |
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