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Issue 39, 2013
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An ultrathin TiO2 blocking layer on Cd stannate as highly efficient front contact for dye-sensitized solar cells

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Abstract

An engineered multilayer structure of platinum–cadmium stannate–titanium oxide (Pt–CTO–TO), with different TO layer thickness (in the range 1–5 nm), has been grown at 400 °C on glass substrates by RF magnetron sputtering, following a 2-step procedure without breaking vacuum. To produce an alternative and reliable front contact for dye sensitized solar cells (DSCs), morphology and composition of a TO blocking layer have been studied, paying particular attention to the oxideoxide (CTO–TO) interface characteristics. The influence of the metallic mesh on the transparent conductive oxide sheet resistance has also been considered. A sputtered CTO layer shows a high average transmittance, over 90%. The Pt mesh yields a drastic reduction in the series resistance, almost one order, without affecting the optical properties. The ultrathin blocking layer of Ti oxide prevents charge recombination, improving the overall performance of the solar cells: +86% in efficiency, +50% in short circuit current, with respect to bare CTO.

Graphical abstract: An ultrathin TiO2 blocking layer on Cd stannate as highly efficient front contact for dye-sensitized solar cells

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Article information


Submitted
28 May 2013
Accepted
09 Aug 2013
First published
09 Aug 2013

Phys. Chem. Chem. Phys., 2013,15, 16812-16818
Article type
Paper

An ultrathin TiO2 blocking layer on Cd stannate as highly efficient front contact for dye-sensitized solar cells

A. Braga, C. Baratto, P. Colombi, E. Bontempi, G. Salvinelli, G. Drera and L. Sangaletti, Phys. Chem. Chem. Phys., 2013, 15, 16812
DOI: 10.1039/C3CP52250D

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