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Figure 3. (A) Comparison of the power-to-weight ratios of various photovoltaics^[58] Copyright © 2023, Springer Nature. (B) Photograph of a researcher holding a roll of printed PSCs on a plastic substrate (CSIRO, Australia)^[71]. (C) PSC based on PET/Ag mesh/PH1000 and its bending test, reported by Li et al.^[76] Copyright © 2016, Springer Nature. (D) Scanning electron microscope (SEM) images of the top and bottom surfaces of a control perovskite film and a bifacial 2D-capping-layered perovskite film after 10,000 convex and concave bending cycles, reported by Jin et al.^[80] Copyright © 2025, Springer Nature.