solar cell fabrication of ETL layer

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Explore the significance of electron transport layers (ETLs) in solar cells, focusing on zinc oxide (ZnO) for its transparency, wide bandgap, and cost-effectiveness. Learn about various ZnO fabrication methods such as sol-gel, hydrothermal techniques, and more. Discover characterisation tools like XRD, SEM, and UV-Vis for structural and optical evaluation, and gain insight into the challenges and future potential of ZnO in enhancing solar cell efficiency.