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. 2021 Apr 30;7(18):eabg3749. doi: 10.1126/sciadv.abg3749

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Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 4 — (A) Optical image of large-area perovskite films. (B) Uniformity of large-area perovskite film on glass substrate characterized by PL mapping. (C) Schematic illustration of the fabricated large-area perovskite film cut into 12 pieces of 4 cm by 4 cm films. (D) Absorption spectra of 12-piece cut from a large-area perovskite sample. (E) Average TRPL lifetime distribution of 12-piece cut from a large perovskite film sample. (F) J-V curves of 12 PSCs with an active area of 1 cm²; the corresponding perovskite films were cut from a large-area perovskite film. Photo credit: Zhichun Yang, Huazhong University of Science and Technology.