Figure 5From: Improved conversion efficiency of Ag2S quantum dot-sensitized solar cells based on TiO2 nanotubes with a ZnO recombination barrier layer J - V characteristics of the plain TNT, Ag 2 S( n )/TNT, and Ag 2 S(n)/ZnO/TNT electrodes. n = 2, 4, and 8.Back to article page