Transport mechanisms and photovoltaic properties of zinc tetraphenylporphyrin/n-type silicon heterojunction solar cellH.M. Zeyada, M.M. El-Nahass and M.A. AliEur. Phys. J. Appl. Phys., 56 1 (2011) 10201DOI: https://doi.org/10.1051/epjap/2011110010