Highly Efficient Solar Cells using TiO2Nanotube Arrays Sensitized with a Donor-Antenna Dye Shankar, Karthik ; Bandara, Jayasundera ; Paulose, Maggie ; Wietasch, Helga ; Varghese, Oomman K. ; Mor, Gopal K. ; Latempa, Thomas J. ; Thelakkat, Mukundan ; Grimes, Craig A. Abstract Publication: Nano Letters Pub Date: June 2008 DOI: 10.1021/nl080421v Bibcode: 2008NanoL...8.1654S