Enhanced output performance of perovskite-based triboelectric nanogenerators devices by surface engineering

Abstract Finding materials with excellent dielectric properties to increase the friction charges density is an effective method to improve the output performance of triboelectric nanogenerators (TENGs). As a star material in semiconductors, perovskite has remarkable dielectric properties and can generate considerable frictional charges, which is expected to enable TENGs to achieve high performance. In this study, the organic-inorganic hybrid (MAPbI 3 ) perovskite is used as friction materials to prepare the TENGs device. The Poly (ethylene glycol) diacrylate (PEGDA) molecule is used to modify the surface of MAPbI 3 to passivize the surface defects of the film, so as to improve the performance of the device greatly. At a mechanical operating frequency of 2 Hz, after PEGDA treatment, the open-circuit voltage, short-circuit current density and transfer charges of the champion device are 276.86 V, 68.61 mA m −2 and 56.08 nC, respectively, which are 54 %, 64 % and 39 % higher than those of the pristine device. And the highest output power density of the device is increased from 3.13 W m −2 to 9.17 W m −2 . The device has excellent continuous operation stability, and the optimized device can light 147 commercial blue LEDs with a power of 0.06 W.