“Activated Carbon Films from Water Hyacinth Waste for Stable and Sustainable Counter-Electrode Application in Dye-Sensitized Solar Cells”, Indones. j. sci. technol., vol. 10, no. 1, pp. 133–144, Apr. 2025, Accessed: Jun. 07, 2026. [Online]. Available: https://ijost.upi.edu/index.php/ijost/article/view/444