Fig. 2: Electrical performance and FEA of RAPSF.

I/V testing results of a single RAPSF and b RAPSF film with different bending radius on the PET substrates. c Resistance of the RAPSF film at different bending radius and the film recovery. The inset shows linear range of resistance for RAPSF film from 12 to 1 mm bending radius. d FEA stress simulation of single fiber for stress analysis in bending state. e Schematic diagram of conductivity of RAPSF with different radius of curvature; the red dashed lines indicate the neutral surface and the orange lines indicate the electron transport paths. f FEA stress simulation of single RAPSF surface, revealing the junction mismatch between silver particles and g corresponding stress along the horizontal central axis. h SEM image of RAPSF film exposed to bending. i Cyclic bending testing of RAPSF film with a bend radius of 8 mm.