Gebeyehu, D. ., and K. . Leo. “ORGANIC THIN-FILM SOLAR CELLS: NEXT GENERATION LOW-COST PHOTOVOLTAIC APPLICATIONS”. Zede Journal of Ethiopian Engineers and Architects, vol. 24, Jan. 2023, pp. 59-65, http://ejol.aau.edu.et/index.php/ZEDE/article/view/6574.