Integration of TiO2 nanotube arrays into solid-state dye-sensitized solar cells J. Bandara, K. Shankar, J. Basham, H. Wietasch, M. Paulose, O. K. Varghese, C. A. Grimes and M. Thelakkat Eur. Phys. J. Appl. Phys., 53 2 (2011) 20601 Published online: 28 January 2011 DOI: 10.1051/epjap/2010100387