Figure 3From: Improved conversion efficiency of Ag2S quantum dot-sensitized solar cells based on TiO2 nanotubes with a ZnO recombination barrier layer The low- and high-magnification TEM images, EDX spectrum, and XRD pattern. (a) TEM image of the Ag2S(4)/ZnO/TNT electrode showing the formation of ZnO on the TNTs and the Ag2S nanoparticles inside the TNTs, (b) an HR-TEM image of a deposited Ag2S quantum dot, (c) the EDX spectrum, and (d) XRD pattern of the Ag2S(4)/ZnO/TNTs.Back to article page