Modulation of mechanical properties and stable light energy harvesting by poling in polymer integrated perovskite films: a wide range, linear and highly sensitive tactile sensor

Abstract

The integration of polymer chains leads to modulation of mechanical properties in organolead halide perovskites, MAPbI₃, making their films softer. As a result these films have a lower modulus and are able to dissipate the applied mechanical stimuli. This effect is used to make a self-powered tactile sensor that has a very wide operating range (up to 450 kPa) and linear response and high sensitivity over the whole range in a single structure. Further the films have an energy harvesting density of 1.1 W m⁻² due to stable poling effects, which is comparable to those of the best reported triboelectric harvesters. Both continuous energy harvesting and continuous tactile detection are possible with these films due to their semiconducting nature and polarization effects.