Keothongkham, Khamsone, and Vilaysak Sayyasone. “Chemically Deposited Polypyrrole Film on Conductive Glass for Dye-Sensitized Solar Cell Counter Electrode Application”. Champasack University Scientific Journal, vol. 1, no. 1, May 2015, pp. 44-51, https://cu-journal.com/index.php/files/article/view/8.