Influence of Acid Modification Multiwall Carbon Nanotube Counter Electrodes on the Glass and Flexible Dye-Sensitized Solar Cell Performance

Figure 4

(a) The optical image of U-CNTs and M-CNTs films coated on the conductive glass. (b) Low and (c) high magnification SEM images of U-CNTs film coated on the conductive glass. (d) Low and (e) high magnification SEM images of M-CNTs film coated on the conductive glass.