Carbon-Nanotube Based Thermoelectrical Paste for Enhancing Solar Cell Effciency Fathi Sanad Mohamed, Shaker Ahmed, O. Abdellatif Sameh, Elmahallawi Iman, A. Ghali Hani and Kirah Khaled E3S Web Conf., 64 (2018) 02005 Published online: 27 November 2018 DOI: 10.1051/e3sconf/20186402005