Dye-Sensitized Nanostructured Crystalline Mesoporous Tin-doped Indium Oxide Films with Tunable Thickness for Photoelectrochemical Applications. - Laboratoire de Chimie des Processus Biologiques Accéder directement au contenu
Article Dans Une Revue J Mater Chem A Mater Energy Sustain Année : 2013

Dye-Sensitized Nanostructured Crystalline Mesoporous Tin-doped Indium Oxide Films with Tunable Thickness for Photoelectrochemical Applications.

Résumé

A simple route towards nanostructured mesoporous Indium-Tin Oxide (templated nano-ITO) electrodes exhibiting both high conductivities and optimized bicontinuous pore-solid network is reported. The ITO films are first produced as an X-ray-amorphous, high surface area material, by adapting recently established template-directed sol-gel methods using Sn(IV) and In(III) salts. Carefully controlled temperature/atmosphere treatments convert the as-synthesized ITO films into nano-crystalline coatings with the cubic bixbyite structure. Specially, a multi-layered synthesis was successfully undertaken for tuning the film thickness. In order to evaluate the performances of templated nano-ITO as an electrode substrate for photoelectrochemical applications, photoelectrodes were prepared by covalent grafting of a redox-active dye, the complex [Ru(bpy)2(4,4'-(CH2PO3H2)2-bpy)]Cl2 1 (bpy=bipyridine). Surface coverage was shown to increase with the film thickness, from 0.7 × 10(-9) mol.cm(-2) (one layer, 45 nm) to 3.5 × 10(-9) mol.cm(-2) (ten layers, 470 nm), the latter value being ~ 100 times larger than that for commercially available planar ITO. In the presence of an electron mediator, photocurrents up to 50 μA.cm(-2) have been measured under visible light irradiation, demonstrating the potential of this new templated nano-ITO preparation for the construction of efficient photoelectrochemical devices.

Dates et versions

hal-01063041 , version 1 (11-09-2014)

Identifiants

Citer

W. Hamd, M. Chavarot-Kerlidou, J. Fize, G. Muller, A. Leyris, et al.. Dye-Sensitized Nanostructured Crystalline Mesoporous Tin-doped Indium Oxide Films with Tunable Thickness for Photoelectrochemical Applications.. J Mater Chem A Mater Energy Sustain, 2013, 1 (28), pp.8217-8225. ⟨10.1039/C3TA10728K⟩. ⟨hal-01063041⟩
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