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. 2016 Apr 15;3:8. doi: 10.1186/s40580-016-0068-8

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© Jin et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — a A schematic energy diagram of poly-3-hexylthiophene (P3HT)/carbon nanotube (CNT) films, I-V characteristics of b electron-only and c hole-only devices. The slope of the I–V curve in logarithmic scale is shown in the two insets of (b) and (c). Reprinted with permission from Lee et al. [46], © 2011, Wiley