N. . Akter, M. M. . Rahman, and S. . Akter, “Introducing a Phenomenon of Single Junction Multiple Band-gap Solar Cell Compared to Single Junction or Multi Junction Solar Cell to Achieve High Efficiency”, ABC j. adv. res., vol. 2, no. 1, pp. 30–35, Jun. 2013, doi: 10.18034/abcjar.v2i1.16.