ADVANCES IN SYNTHESIS AND CHARACTERIZATION OF ZnO and ZnO/CNT NANOCOMPOSITES FOR SOLAR CELL APPLICATION.

 ADVANCES IN SYNTHESIS AND CHARACTERIZATION OF ZnO and ZnO/CNT NANOCOMPOSITES FOR SOLAR CELL APPLICATION.

Abstract: The low power conversion efficiency resulting from the recombination of photogenerated charges in TiO2-based photovoltaic devices poses significant challenges to the photoelectrode efficiency of such devices. To address this issue, the exploration of alternative materials is crucial. In this study, we investigated the potential of ZnO and a composite of Zinc Oxide and Carbon Nanotube (ZnO/CNT) at various optimized ratios to minimize the loss of photogenerated electrons during photovoltaic activity. Nanostructured ZnO and ZnO/CNT composites at ratios of 0.1, 0.3, and 0.5 wt% were synthesized using a hydrothermal method.

The synthesized nanostructured ZnO/CNT composites were subjected to optical and structural characterizations through UV-Vis spectroscopy and X-ray diffraction spectroscopy (XRD). The results revealed that the presence of CNTs significantly enhanced the optical properties of ZnO, with the improvement becoming more pronounced with an increasing concentration of CNTs. Additionally, the XRD data indicated the presence of a nanostructured crystalline phase with geometric cubic and hexagonal planes of ZnO at (100), (002), (101), (110), and (102) orientations.

Overall, the composite materials synthesized using the hydrothermal method exhibited promising properties, indicating their potential suitability as photoelectrodes in solar cell applications. By replacing TiO2 with ZnO and ZnO/CNT composites, this research contributes to the advancement of photovoltaic device technology and addresses the challenges associated with low power conversion efficiency in TiO2-based photovoltaic devices.

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