Fig. 2From: Double-Sided Transparent TiO2 Nanotube/ITO Electrodes for Efficient CdS/CuInS2 Quantum Dot-Sensitized Solar Cells a A top-view SEM image of prepared DTTO film. b A cross-sectional view of the detached TNTs from Ti substrate. c A top-view image of the CuInS2/DTTO film. d A SEM image of one single CuInS2/TiO2 nanotube. Top-view images of as-prepared CdS(10)/CuInS2/DTTO (e) and CdS(15)/CuInS2/DTTO (f) filmsBack to article page