Abstract
Abstract The formation of TiO 2 nanotube arrays by anodisation of Ti in fluoride/ethylene glycol (EG) electrolyte added to it lithium hydroxide (LiOH) or potassium hydroxide (KOH) at 60 V for 60 min was investigated. Highly ordered 15 μm long TiO 2 nanotubes (TNTs) were produced in LiOH/fluoride/EG and 18 μm long TNTs were obtained in KOH/fluoride/EG. The as-anodized TNTs in these alkaline electrolytes were found to be crystalline and obviously annealing increases the crystallinity. Annealed TNTs were used as a photoanode in a backside illuminated dye-sensitized solar cell (DSSC). Photoconversion efficiency, η of 3% was achieved for sample with photoanode prepared in KOH/fluoride/EG higher than DSSC with TNTs photoanode fabricated in LiOH/fluoride/EG.
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