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. 2021 Aug 12;12:4879. doi: 10.1038/s41467-021-25140-2

Fig. 1. The bandgap modulation of (F-PEA)2PbI4 PSCs via femtosecond laser shocking.

Fig. 1

a Schematic of the laser-shock deformation process of (F-PEA)2PbI4 PSCs. b The relationship between laser energy density and maximum laser shocking pressure. c Tauc curves obtained from ultraviolet-visible absorption spectra reveal bandgap values variation with ultrafast pressure. d photoluminescence spectra under ultrafast pressure. e According to the Tauc curve, the bandgap decreases with ultrafast pressure, while the full-width at half-maximum (FWHM) of photoluminescence (PL) spectra is the opposite.