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Photo-Rechargeable Organic–Inorganic Dye-Integrated Polymeric Power Cell with Superior Performance and Durability
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posted on 2019-04-18, 00:00 authored by Farha Khatun, Pradip Thakur, Arpan Kool, Swagata Roy, Nur Amin Hoque, Prosenjit Biswas, Biswajoy Bagchi, Sukhen DasIn
the present work, we propose
a simple and unique approach to design a lightweight, low-cost, self-charging
power cell with considerable capacity to generate and store photocharges
named self-charged photo-power cell (SCPPC). Initially, highly electroactive
sodium dodecyl sulfate (SDS)-incorporated poly(vinylidene fluoride)
(PVDF) composite thin films with a large dielectric constant of ∼525
are synthesized via a simplistic solution casting process. Then, the
as-prepared high-dielectric SDS/PVDF thin film is used as a charge-storage
medium in combination with an inorganic–organic dye film, i.e.,
ZnO nanoparticles–eosin Y–poly(vinylpyrrolidone) film,
as a photoelectron generator in our SCPPC. An open-circuit voltage
of ∼1.2 V is attained after charging SCPPC under illumination
light with intensity ∼110 mW/cm2 and then discharging
fully with a constant current density of ∼4.5 mA/cm2. A specific areal capacitance of ∼450 F/m2 is
obtained with large energy and power densities of ∼90 mWh/m2 and 54 W/m2, respectively. The improved overall
efficiency, ∼3.78%, along with 89% storage efficiency leads
to promising application possibilities of our rechargeable photo-power
cell. The recyclability, i.e., rechargeability and storage durability,
of the photo-power cell are also checked for 35 days without no such
reduction in voltage generation and storage. Also, multicolored light-emitting
diodes are lightened up using the photo-power cell as power source.