Figure 3From: High-efficiency dye-sensitized solar cells based on robust and both-end-open TiO2 nanotube membranes Optical images and schematic illustration for the preparation of front-side illuminated DSSCs. (a) Optical image of the free-standing membranes adhered on FTO glass. (b) Schematic illustration of DSSC fabricated with free-standing TNT membrane. (c) Optical image of our DSSC sample with the front side upturned.Back to article page