“…1,2 A metal sheet is another choice to fabricate a flexible DSSC because it can endure very high temperatures. Though several authors have used TiO 2 as the semiconducting material for flexible DSSCs, 3,4 a few have suggested ZnO as a fascinating alternative to TiO 2 , [5][6][7] because it possesses high electronic mobility, provides a direct conduction pathway for rapid collection of photoinjected electrons at the substrate of a photoanode, and has a similar conduction band level to that of TiO 2 . Although one-dimensional (1-D) ZnO nanostructures, such as nanorods, nanowires, nanotubes can provide direct conduction pathways for rapid collection of photoelectrons at the substrate of a photoanode, their relatively low surface area for dye adsorption is the main constraint for achieving high performance DSSCs based on these 1-D ZnO at present.…”