Improving photovoltaic performance of P3HT: IC60BA based organic solar cell: N-type doping effect Meriem Erray, Aumeur El Amrani, Mounir Hanine, Mohamed El Amraoui and Lahcen Bejjit Eur. Phys. J. Appl. Phys., 97 (2022) 23 Published online: 06 May 2022 DOI: 10.1051/epjap/2022210294