Preparation, characterization, and application of titanium nano-tube array in dye-sensitized solar cells
1 Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, 10608, Taiwan, Republic of China
2 Department of Chemistry, National Central University, Chung-Li, 32001, Taiwan, Republic of China
Nanoscale Research Letters 2012, 7:147 doi:10.1186/1556-276X-7-147Published: 21 February 2012
The vertically orientated TiO2 nanotube array (TNA) decorated with TiO2 nano-particles was successfully fabricated by electrochemically anodizing titanium (Ti) foils followed by Ti-precursor post-treatment and annealing process. The TNA morphology characterized by SEM and TEM was found to be filled with TiO2 nano-particles interior and exterior of the TiO2 nano-tubes after titanium (IV) n-butoxide (TnB) treatment, whereas TiO2 nano-particles were only found inside of TiO2 nano-tubes upon titanium tetrachloride (TiCl4) treatment. The efficiency in TNA-based DSSCs was improved by both TnB and TiCl4 treatment presumably due to the increase of dye adsorption.