Stacked vanadium pentoxide-zinc oxide interface for optically-chargeable supercapacitors

Chauhan, PS and Kumar, S and Mondal, A and Sharma, P and Parekh, MN and Panwar, V and Rao, AM and Misra, A (2022) Stacked vanadium pentoxide-zinc oxide interface for optically-chargeable supercapacitors. In: Journal of Materials Chemistry A, 11 (1). pp. 95-107.

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Abstract

Optically-chargeable supercapacitors effectively convert photon energy into electrochemical energy and store them for further utilization. In this work, we developed a metal oxide-based optically responsive symmetrical supercapacitor using a novel stacked vanadium pentoxide/zinc oxide (V2O5/ZnO) semiconducting heterostructure on fluorine-doped tin oxide (FTO) glass. The selected metal oxides' distinct bandgaps and work functions form a unique heterostructure that facilitates the separation and flow of photogenerated charge carriers. The stacking induces a maximum increment of ∼178% in specific capacitance under ultraviolet (UV) light illumination measured from the device's galvanostatic charge-discharge (GCD). The effect of UV light on the device was also verified by analyzing the open circuit potential, where the device showed excellent electrochemical performance and stability for more than 5000 cycles. These findings pave a progressive way toward developing self-chargeable energy storage devices and promise breakthrough advancements. © 2023 The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Journal of Materials Chemistry A
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Electric discharges; II-VI semiconductors; Nanocomposites; Tin oxides; Vanadium pentoxide; Wide band gap semiconductors; Zinc oxide, Electrochemical energy; Fluorine doped-tin oxides; Further utilization; Metal-oxide; Oxide glass; Photon energy; Selected metals; Ultra-violet light; Ultraviolet lights; Vanadium pentoxide, Supercapacitor
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	25 Jan 2023 10:05
Last Modified:	25 Jan 2023 10:05
URI:	https://eprints.iisc.ac.in/id/eprint/79513

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