Highly Efficient and Durable Piezoelectric Nanogenerator and Photo-power cell Based on CTAB Modified Montmorillonite Incorporated PVDF Film

Herein, we have successfully designed two ecofriendly, biocompatible, and cost-effective devices, i.e., a piezoelectric nanogenerator (PENG) and a self-charged photo-power cell (PPC) by developing a multifunctional cetyltrimethylammonium bromide (CTAB) modified montmorillonite (MMT) incorporated poly­(vinylidene fluoride) (PVDF) thin film with large electroactive β crystallites and dielectric properties. Incorporation of CTAB modified MMT in PVDF leads to nucleation of piezoelectric β crystallite (F(β)) ∼ 91% as well as the dielectric constant ∼48 at 3 mass % doping of CTAB-MMT. The enrichment of the electroactive β phase crystallization and high dielectric constant pilot to a good piezoelectricity (d₃₃) ∼ 62.5 pC/N at 50 Hz of the thin film. Our CTAB-MMT/PVDF based PENG (CMPENG) with superior piezoelectricity shows high output power generation with power density ∼ 50.72 mW/cm³ under periodic finger impartation and having the ability to charge a 1 μF capacitor up to 2.4 V within 14 s under gentle finger impartation. CMPENG also have the potential to glow up commercially available 26 blue light-emitting diodes (LEDs) connected in series. The self-charged PPC has been designed with the thin film in association with MnO₂-MWNT/PVP/H₃PO₄. Our PPC is able to generate supercilious output voltage ∼ 1.38 V and short circuit current ∼ 3.7 mA/cm²under light illumination with specific areal capacitance and energy storage efficiency of ∼1501 F/m² and ∼93%, respectively. The realistic application of our PPC is investigated by lighting 24 blue LEDs for 7 days with the same intensity by charging the device once for 50 s.