Edwalder Silva Teixeira, et al. “Copper Decorated on Fluorine Doped Tin Oxide As a Transparent Conductor Oxide for Photovoltaic Energy by DSSCs”. Global Journal of Science Frontier Research, vol. 21, no. H4, Mar. 2021, pp. 1-14, https://journalofscience.org/index.php/GJSFR/article/view/2965.