High‐Performance Organic–Inorganic Hybrid Piezo‐Nanogenerator via Interface Enhanced Polarization Effects for Self‐Powered Electronic Systems

An electrospun fiber based wearable organic–inorganic hybrid piezo‐nanogenerator compose of suitably engineered P(VDF‐TrFE) and BaTiO 3 nanostructures is reported. In the case of the device with an electrospun mat of piezoelectric β‐phase P(VDF‐TrFE) and BaTiO 3 nanoparticulates filled in the interfiber open spaces, a power density of 16 μW cm −2 is realized at an applied impact of 0.02 MPa (which essentially corresponds to the thumb pressure). A similar device, with BaTiO 3 additionally embedded in the P(VDF‐TrFE) fibers during their formation, renders a significantly higher peak power density of 28 μW cm −2 with instantaneous power density of ≈8.8 μW cm −2 at the same touch pressure. This performance is attributed to the high density of interfaces in such a device and the corresponding enhancement in the dielectric response. It is demonstrated that the power generated from such a hybrid device structure can be used for small scale applications such as charging a mobile phone.