Enhanced electrochemical properties of ZnO nanoparticles-incorporated chitosan-based electrolyte as candidates for redox mediator in dye sensitized solar cells
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Adella Vega Aulia Shafa
Abstract
This study investigates the application of quasi-solid-state polymer electrolytes as a candidate to replace liquid electrolytes in dye-sensitized solar cells (DSSCs) for addressing challenges such as electrolyte leakage and counter electrode corrosion. Chitosan, a biodegradable, non-toxic, odorless polymer known for its high mechanical strength, is explored for its potential in this role. To improve the electrochemical performance of chitosan-based polymer gel electrolytes, ZnO nanofillers, specifically ZnO nanorods and ZnO nanospindles synthesized via hydrothermal methods, were incorporated into the chitosan matrix, which was mixed with KI and I2 in CH3COOH. The polymer gel electrolyte was then characterized using cyclic voltammetry, Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The integration of ZnO nanoparticles enhances ionic conduction by providing additional pathways. The results show that incorporating 0.25 wt% ZnO nanorods into the polymer matrix yields anodic and cathodic peak currents of 6.68 mA and −9.37 mA, with a half-wave potential of 0.383 V (vs. Ag/AgCl). In comparison, incorporating 0.5 wt% ZnO nanospindles produces anodic and cathodic peak currents of 7.72 mA and −10.3 mA, with a half-wave potential of 0.380 V (vs. Ag/AgCl).
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
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