Ahmed, T. O., N. Alu, and A. Y. Abdul Rahman. “Comparative Study on the Photovoltaic Properties of Dye-Sensitized Solar Cells (DSCs) Based on Different Counter Electrode Configurations”. Journal of Materials Science Research and Reviews, Vol. 3, no. 2, Apr. 2019, pp. 1-9, http://journaljmsrr.com/index.php/JMSRR/article/view/30088.