Fig. 1: Fabrication of composite membranes.
From: Layered polymer-perovskite composite membranes for ultraflexible fatigue-tolerant optoelectronics
a Schematic of free-standing composite membrane for ultraflexible electronic application. b Self-organized layered microstructures constituting bicontinuous periodic polymer and perovskite phase. c Dependence of mechanical flexibility and photoelectric property of the composite membrane as a function of filler (perovskite) mass fraction (f). d Scalable assembly of composite membranes via layer-by-layer spray-coating technique. e Photograph of a freestanding large-area (10 × 10 cm2) composite membrane under folding state. Scale bar is 5 cm. f Photographs of composite membranes showing ultraflexibility by twisting, poking and bending. Scale bars are 1 cm. g Oblique-view and cross-sectional SEM images and HAADF-STEM image of the composite membrane. Inset is the atomic model structure of CsPbBr3 perovskite. Blue: cesium atoms; gray: lead atoms; yellow: bromine atoms. Scale bars are 10 μm, 1 μm, and 1 nm, respectively. h Summary of the mobility-lifetime product (μτ) and Young’s modulus (E) for different materials. PCF and SC refer to polycrystalline film and single crystal, respectively.
