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. 2016 Dec 16;6:39163. doi: 10.1038/srep39163

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) 0 (solid line), (b) 0.6 (open circles), (c) 1.2 (open squares), and (d) 1.8 mg/ml (open triangles). The dashed lines represent the J-V characteristics of the cell under dark condition. The power conversion efficiency (PCE) of the cells with various concentration of GQDs are also shown.