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. 2017 Mar 8;148(5):795–826. doi: 10.1007/s00706-017-1933-9

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© The Author(s) 2017

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. 8 — a J–V curves under illuminated and dark conditions and b IPCE (incident photon-to-electron conversion efficiency) spectra of copper halide perovskite-based solar cells using (p-F-C₆H₅C₂H₄NH₃)₂CuBr₄ (P1) and (CH₃(CH₂)₃NH₃)₂CuBr₄) (P2) as absorber materials. Adapted with permission from [34]. Copyright (2015) Elsevier