Organized Mesoporous TiO2 Films Stabilized by Phosphorus: Application for Dye-Sensitized Solar Cells

0331908 - ÚFCH JH 2011 RIV US eng J - Článek v odborném periodiku
Zukalová, Markéta - Procházka, Jan - Zukal, Arnošt - Yum, J. H. - Kavan, Ladislav - Graetzel, M.
Organized Mesoporous TiO2 Films Stabilized by Phosphorus: Application for Dye-Sensitized Solar Cells.
Journal of the Electrochemical Society. Roč. 157, č. 1 (2010), H99-H103. ISSN 0013-4651. E-ISSN 1945-7111
Grant CEP: GA MŠMT LC510; GA MŠMT OC09048; GA AV ČR IAA400400804; GA AV ČR KAN200100801; GA AV ČR KAN100500652
Výzkumný záměr: CEZ:AV0Z40400503
Klíčová slova: annealing * anodes * mesoporous materials * dyes
Kód oboru RIV: CG - Elektrochemie
Impakt faktor: 2.420, rok: 2010

A synthetic protocol was developed for the preparation of thin mesoporous TiO2 films with enhanced thermal stability. This objective was achieved by a modification of the procedure of supramolecular templating by a Pluronic P-123 copolymer by an addition of a small amount of phosphoric acid to the precursor solution. Thin mesoporous TiO2 films up to 2.3 µm thick were prepared via layer-by-layer deposition. The roughness factor exceeding 1300 was achieved on these films. After annealing at 540°C, well-developed 5–6 nm anatase nanocrystals were present in the pore walls of a still perfect mesoporous structure. The pore coalescence and structure collapse during heat-treatment were effectively hindered by the presence of phosphorus. Our P-modified mesoporous TiO2 films were sensitized with the N-945 dye and used as photoanodes of the dye-sensitized solar cells. They reached the conversion efficiency of 5.03 or 5.05% for the film thickness of 1.8 or 2.3 µm, respectively.
Trvalý link: http://hdl.handle.net/11104/0177300