High-Performance Piezoelectric Generator Based on a Monocrystalline LiNbO₃ Fiber

Energy harvesting from mechanical compression and stretching movements is an effective strategy for powering electronic devices. Piezoelectric materials are robust and can be activated by small movements or physical disturbances across various frequencies. With this in mind, the present study proposes the fabrication of monocrystalline lithium niobate (LiNbO3) piezoelectric fibers, grown using the laser-heated pedestal growth (LHPG) technique and their application as high-efficiency energy converters. Electrical power generation was observed in response to mechanical deformations applied to the fabricated monocrystalline piezoelectric generator (PG). Under compression and stretching deformations of the LiNbO3 piezoelectric monocrystalline fiber, one can find electric power generation in the range of 9.85 to 32.41 μW for stretching, and 19.55 μW at 34.13 μW for compression, with the application of 1 V. These results underscore the efficiency of monocrystalline lithium niobate (LiNbO3) fibers in converting ambient mechanical energy into electrical energy, positioning them as a viable and environmentally friendly (lead-free materials) alternative to traditional piezoelectric materials in energy harvesting devices.