A dye-sensitized solar cell based on natural photosensitizers and a PEDOT:PSS/TiO2 film as a counter electrodeFatemeh Jafari, Abbas Behjat, Ali R. Khoshroo and Maral GhoshaniEur. Phys. J. Appl. Phys., 69 2 (2015) 20502DOI: https://doi.org/10.1051/epjap/2015140370