Third Microsymposium of the "International Scholarship Program for Graduate Studies in Faculty of Chemistry, University of Warsaw - From simple molecules to nanostructured and bioactive materials" October 6 - 8th, 2011, Palace in Łochów, Poland
Chronicle
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Thursday Oct. 6th 17:45 - 18:15 – Alex Kuzmych Testing of a titanium dioxide nanostructured material as a cathode in solid and liquid state dye sensitized solar cells Optimum preparation conditions were established for synthesis of free standing TiO2 nanotubes (TNT) on transparent conducting glass substrate. First, a thin TiO2 blocking layer and Ti thin film of 2 µm thickness were sputtered , at a high temperature (550°C ) in UHV conditions on FTO glass substrate. Second, an anodization of the resulting film in F- containing viscous electrolyte was performed at 5°C for several hours until a formation of optically transparent highly homogenous TNT layer of about 4.5 µm thickness was complete. After thermal treatment to enhance superior electron conducting properties, the obtained layer was used as a cathode in assembled D35 dye sensitized solar cells with Spiro-MeO TAD (2,2’7,7’-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9’-spirobifluorene) organic molecule chosen as hole conducting material and Co3+/Co2+ electrolyte pair in solid and liquid state respectively. Their power conversion efficiency was compared under “1 sun” solar simulator operating conditions at room temperature and conclusions were made as to a strategy to improve solid state cell performance. 
Discussion 
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