Defaru Negera, & Teketel Yohannes. (2018). Hansen Solubility parameters and Green Solvents for Organic Photovoltaics. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, 4(10), 119–128. https://doi.org/10.31695/IJASRE.2018.32842