Toward Hierarchical TiO₂ Nanotube Arrays for Efficient Dye‐Sensitized Solar Cells

A step-wise template process is developed for the fabrication of high-aspect-ratio, hierarchical TiO2 nanotube arrays directly on transparent conductive oxides. Significantly enhanced dye loading capability and photoelectrochemical performances are demonstrated in dye-sensitized solar cells with the adoption of a hierarchical nanocrystalline shell. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.