Fig. 2: Nanoscale perovskite lithography and temporal dynamics control. | Nature Communications

Fig. 2: Nanoscale perovskite lithography and temporal dynamics control.

From: Femtosecond laser direct nanolithography of perovskite hydration for temporally programmable holograms

Fig. 2

a The fluorescence spectra of the (PEA)2PbI4 perovskite thin films under the fs laser excitation. b The double logarithm plots of the fluorescence intensity vs. laser power density with a linear fit. c The printed line width and dot size as a function of the laser fluence, with the insets showing representative SEM images of the line and dot arrays. Scale bars, 3 μm. Error bars (standard deviation) were calculated by randomly selecting five different points (lines) and the data were expressed as mean values ± SD. d The transmission signal evolution of the microscopy images of four printed dots with various laser fluences. e Optical microscopy image evolution of the laser-processed square-shaped perovskite areas. Scale bar, 50 μm. f Transmission change at the wavelength of 515 nm of the perovskite thin film after laser processing with different fluences.

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