In situ synthesized electroactive and large dielectric BaF2/PVDF nanocomposite film for superior and highly durable self-charged hybrid photo-power cell
2018
Khatun, Farha | Thakur, Pradip | Amin Hoque, Nur | Kool, Arpan | Roy, Swagata | Biswas, Prosenjit | Bagchi, Biswajoy | Das, Sukhen
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.
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