Comparison of Anodic TiO2‐Nanotube Membranes used for Frontside‐Illuminated Dye‐Sensitized Solar Cells

In the present work we compare TiO2‐nanotube lift‐off strategies for the construction of frontside‐illuminated dye‐sensitized solar cells (DSSCs). Anodic nanotube layers were detached from the metallic back contact by using different techniques and transferred onto a fluorine‐doped tin oxide substrate. We show that if we use an optimized potential step treatment to fabricate membranes, DSSC efficiencies can be significantly increased (η>8 %). The improved efficiency is ascribed to higher specific dye loading and enhanced electron‐transport properties of optimally fabricated TiO2‐nanotube membranes.