Piezo-phototronic effect improved performance of n-ZnO nano-arrays/p-Cu2O film based pressure sensor synthesized on flexible Cu foil

A performance improved pressure sensor based on n-ZnO nano-arrays/p-Cu2O film structure is realized on flexible Cu foil using Piezo-phototronic effect. The linear dependence of switch ratio (SR) (I /I0) on the applied pressure is further improved by the illumination radiation of the 405 nm LEDs tactfully embedded within the device. In addition, the sensitivity (I-I0/I0/∆P) of the pressure can be improved by adjusting the illumination intensity.253