Synthesis and characterizataion of magnesium (Mg) doped ZnO nanomaterials with variations in growth time for DSSC applications

Iwantono Iwantono, Fitriatunisa' Al-Fajri, Marlia Morsin, Friska Ziliwu

Abstract


This research aims to investigate the effect of growth time variation of magnesium-doped zinc oxide (ZnO:Mg) nanomaterials on the efficiency of dye-sensitized solar cells (DSSC). The synthesis method employed was the seed-mediated hydrothermal process, with a Mg doping concentration of 4% mol and growth times ranging from 9 and 10 hours. The variation of growth time was selected to analyze the relationship between the morphological evolution of ZnO:Mg nanorods and their optical properties as well as crystal structure. The samples were characterized using ultraviolet-visible spectroscopy (UV-Vis) to study optical properties, X-ray diffraction (XRD) to determine crystal structure, field emission scanning electron microscopy (FESEM) to observe morphology, and energy dispersive X-ray (EDX) to identify elemental composition. The results showed that the variation of growth time affected the optical properties, crystal structure, morphology, and DSSC efficiency. The ZnO:Mg sample with an 9-hour growth time exhibited the highest absorbance of 1.45 a.u., the lowest band gap energy of 3.33 eV, and the best crystallinity with an FWHM value of 0.23° and a crystal size of 35.27 nm. FESEM analysis revealed denser and more homogeneous nanorod morphology, while EDX analysis showed the highest Mg content of 0.70% atomic percentage in the 9-hour sample.

Keywords


DSSC; growth time; hydrothermal; nanorod; ZnO:Mg

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References


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DOI: http://dx.doi.org/10.31258/jkfi.23.2.81-88

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