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In situ synthesized electroactive and large dielectric BaF2/PVDF nanocomposite film for superior and highly durable self-charged hybrid photo-power cell

Khatun, Farha, Thakur, Pradip, Amin Hoque, Nur, Kool, Arpan, Roy, Swagata, Biswas, Prosenjit, Bagchi, Biswajoy, Das, Sukhen
Energy conversion and management 2018 v.171 pp. 1083-1092
crystallites, energy, lighting, nanocomposites, nanoparticles, phosphoric acid, pyrrolidones, titanium dioxide
In present work, a simplistic, efficient and highly durable electroactive and high dielectric BaF2 nanoparticles (NPs) incorporated polyvinylidene fluoride (PVDF) thin film based Self-Charged Hybrid Photo-Power Cell (HPPC) has been designed which is able to self-charge under visible light illumination. The incorporation of NPs into the PVDF matrix has effectively enhanced the polar β crystallite nucleation (∼96%) and the dielectric value (∼2570) of the PVDF thin film. A composite dye film of TiO2 NPs, phenosafranine-polyvinyl pyrrolidone in the presence of H3PO4 is acted as the light absorbing and photoelectrons generating part in the HPPC. The photo-electrons are stored in the energy storage part made of the in situ synthesized BaF2 NPs embedded PVDF thin film. Our HPPC is able to generate a photovoltage ∼1.3 V within 65 s under exposure of visible light (∼110 mW/cm2) with superior energy storage efficiency ∼79%. The device has the ability of storing charge ∼1200 F/m2 with power density ∼18.7 W/m2 and charge density ∼1500 C/m2. Our light weighted self-charged power bank may be utilized as power supplier in portable electronic appliances.