Karki, IB, JJ Nakarmi, PK Mandal, and S Chatterjee. “Absorption Spectra of Natural Dyes and Their Effect on Efficiency of ZnO Based Dye-Sensitized Solar Cells”. Nepal Journal of Science and Technology 13, no. 1 (January 21, 2013): 179–185. Accessed May 3, 2024. https://www.nepjol.info/index.php/NJST/article/view/7457.