Determining the exciton diffusion length of copper phthalocyanine in operating planar-heterojunction organic solar cellsXi Guan, Shiyu Wang, Wenxing Liu, Dashan Qin and Dayan BanEur. Phys. J. Appl. Phys., 89 3 (2020) 30201DOI: https://doi.org/10.1051/epjap/2020190322
