Cube shaped FAPbBr₃ for piezoelectric energy harvesting devices

In order to meet the ever-increasing call for alternative energy, a plethora of novel materials have been explored to harvest energies. Amongst them, organic–inorganic halide perovskites belong to a relatively new class of compounds. In this work, we have prepared FAPbBr₃ cubes via solution process and explored its candidature in energy harvesting. Piezoelectric nanogenerator (PNG) based on the composite of FAPbBr₃ and poly (vinylidene fluoride) (PVDF) showed noticeable output performance. To get benchmark level output response, concertation of perovskite was optimized in composites. PNG fabricated with 3.0 wt% FAPbBr₃ in PVDF exhibited an instantaneous output voltage of ~200 V and current of ~650nA. It also showed long cycle stability (10,000 cycles) and durability under robust conditions. Energy generated from the PNG was further utilized to charge a capacitor and light up commercial LEDs. As obtained results are of great importance and open the feasibility of novel smart device using this kind of perovskites.