Resumo

NAZARIO, Russell; SAVERO TORRES, Williams; PALACIOS, Eduardo  e  QUINTANA, María. Evaluation of blocking layers sensitized solar cells of nanostructured titanium oxide. Rev. Soc. Quím. Perú [online]. 2015, vol.81, n.2, pp.109-121. ISSN 1810-634X.

In conventional Grätzel cells, the conductive substrate (FTO) on the electrode, a mesoporous TiO₂ layer ~ um, prepared by the doctor blade method, with a heat treatment at 450 ° C, the dye-sensitized deposited (D7). In this article an additional TiO₂ layer between the FTO and the electrode is added, because the electrode has a high porosity and don´t has a good contact with the FTO, so we suggested adding a compact layer that helps transfer electron of electrode to FTO and prevents direct contact between the FTO and electrolyte. Thus electron recombination is prevented by the FTO hollow electrolyte. Subsequently certain characterizations are performed to determine the thickness of the block and to analyze the morphology of the electrode by Scanning Electron Microscopy. Finally the I-V curve was we determined to analyze its efficiency with a radiation of 1000W/ m² efficiency of 2,39% was reached.

Palavras-chave : Electrode; sensitized; blocking layer; electrolyte; recombination.

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