Piezoelectric potential-enhanced output and nonlinear response range for self-powered sensor on curved surface

Triboelectric nanogenerator (TENG)-based dynamics sensors usually suffer from low output and nonlinear response (inconsistent sensitivity) in wider detection range, especially at curved state. Here, we investigated the influence of piezoelectric potential and dipole moment on electrical output of TENG by fabricating four modes of TENGs with different polarized PVDF and working modes. Moreover, piezoelectric potential can be utilized to tune the interfacial energy band structure by piezotronic effect, which significantly improves the sensing performance of TENG-based pressure sensor, achieving linear response and high sensitivity in a wider range. In application, such sensor is good at human-body monitoring, such as acoustic wave, pulse wave and respiratory wave.

Automated summary

Researchers investigated the influence of piezoelectric potential and dipole moment on the electrical output of TENG by fabricating different modes of TENGs with polarized PVDF. They found that the piezoelectric potential can improve the sensing performance of TENG-based pressure sensors, leading to linear response and high sensitivity in a wider range. The sensor shows great potential for applications in human-body monitoring, such as acoustic wave, pulse wave, and respiratory wave.