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a) Structure and b) energy‐level diagram of the fiber‐shaped perovskite solar cell. Reproduced with permission.67 Copyright 2014, Wiley‐VCH. c) Schematic of the fiber‐shaped perovskite solar cell (FPESC) structure. d) SEM cross‐sectional image of the FPSC. e) Image of typical FPSC. Reproduced with permission.69 Copyright 2016, RSC Publishing.
