Substantial improvement on electrical energy harvesting by chemically modified/sandpaper-based surface modification in micro-scale for hybrid nanogenerators

摘要

Herein, a unique energy harvester made of triboelectric and piezoelectric effects made of a dual perovskite solid system by substituting a trace amount of perovskite BaTiO3 into the parent material K0.5Na0.5NbO3 material. The combined system (1 - x) K0.5Na0.5NbO3- x BaTiO3 at x = 0, 0.02, 0.04, 0.06 and 0.08 is lead-free and eco-friendly in nature. The doping concentration KNN- 0.02 BTO shows high remnant polarization and electrical response. The active layer of the hybrid device is made of mixing KNN- 0.02 BTO into the PDMS matrix. The electrical response of the composite film is studied systematically with the addition of various weight percentages of nanoparticles into the PDMS matrix, where 10 wt% shows the high electrical output. The electrical responses with respect to surface roughness have been studied, and the roughness has been created using cost-effective soft lithographic techniques. The individual components, such as TENG and PENG, in comparison with the hybrid device, had been systematically studied, and the hybrid performance is high compared to individual components. The PCF-NG device generates a maximum electrical output of similar to 610 V/13.7 mu A with a power density of 0.55 W/m(2) at load resistance of 100 MO. Further, the device demonstrates capability in powering low power electronic devices such as capacitor charging, LED lit up, and powering wristwatches. This work would provide an opportunity for developing a stable and highly reliable built-in power source for various applications and would lead a path towards battery-free smart electronics.