S. S. Than, T. H. Lwin, S. H. Aung, N. W. Lwin, and T. Z. Oo, “Electron Blocking Behavior of Electrochemically deposited TiO2 Compact layers for meso- and planar-perovskite Solar Cells”, Cre.Sci., vol. 12, no. 1, pp. 122–129, Jan. 2020.