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Effects of Substrate Heating on the Photovoltaic Characteristics of Dye-Sensitized Solar Cells During Two-Step Ti Film Deposition by RF Magnetron Sputtering

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Nanoporous Ti metal film electrodes for use as photoanodes in dye-sensitized solar cells (DSSCs) were deposited directly on the nanoporous TiO2 layer using the two-step RF magnetron sputtering technique. The Ti film electrode replaces the transparent conducting oxide (TCO) layer. The effect of substrate heating during the deposition of the Ti film was studied to improve the porosity and columnar array of the film pores and the resulting cell efficiency. The porous Ti layer (∼1 μm) with low sheet resistance (∼1.7 Ω/sq) was obtained by deposition at 250 °C. The porous Ti layer collects electrons from the TiO2 layer and allows the diffusion of I /I 3 through the holes. The DSSC efficiency (η) using porous Ti layers with highly columnar structures was measured with the highest conversion efficiency of ∼5.77%; the other photovoltaic properties were ff: 0.76, V oc: 0.72 V, and J sc: 10.6 mA/cm2.
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Document Type: Research Article

Publication date: 2012-04-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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