A facile method to form highly-ordered TiO2 nanotubes at a stable growth rate of 1000 nm min−1 under 60 V using an organic electrolyte for improved photovoltaic properties

چکیده مقاله

An effective method has been developed for the preparation of highly ordered TiO2 nanotubes
(TNTs) at a rapid growth rate. The idea is based on increasing the backside temperature
of Ti foil during the anodization process, thereby enhancing the chemical reaction and ion
mobility at the barrier layer. A combination of electropolishing pretreatment with the backside
temperature increase showed a signi!cant growth rate and hexagonal ordering improvement of
TNTs. The most rapid growth rate obtained was approximately 1000 nm min−1 under 60 V and
at a backside temperature of 70 °C with an almost constant rate. The resulting TNTs were used
as a photoanode in dye-sensitized solar cells in which the corresponding ef!ciency improved
up to about 40% compared with TNTs fabricated using a backside temperature of 20 °C