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. 2018 Jan 16;10(2):34. doi: 10.1007/s40820-018-0187-3

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© The Author(s) 2018

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. 4 — a Best performed current density–voltage (J–V) curves of typical small-area (0.071 cm²) carbon-based CsPbBr₃ PSCs with CuPc as HTM or without HTM measured under 100 mW cm⁻² photon flux (AM 1.5G), respectively. b IPCE spectra and corresponding integrated photocurrents. Box charts exhibiting the statistical features of c J_SC, d V_OC, e FF, and f PCE of the carbon-based CsPbBr₃ PSCs with CuPc as HTM or without HTM