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Fabrication of Dye-Sensitized Solar Cells Using Nb2O5 Blocking Layer Made by Sol–Gel Method

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Abstract:

In this study, nanocrystalline Nb2O5 thin film has been prepared via sol–gel process using niobium ethoxide as a precursor. Sol–gel films using various ratios of H2O/Nb have been prepared on fluorinated tin oxide (FTO) glass substrate, and used as electron-blocking layer of dye-sensitized solar cell (DSSC). The Nb2O5 film as deposited was amorphous, but became crystalline with hexagonal phase after heat treatment at 600 °C. With higher H2O/Nb molar ratio, denser and more uniform Nb2O5 film surface was obtained. DSSCs with the structure of FTO/Nb2O5/TiO2/Dye/EL/Pt/FTO have been prepared, and their solar-cell performance was evaluated. By introduction of Nb2O5 sol–gel film between FTO and TiO2 layer in DSSCs, energy conversion efficiency could be improved.

Keywords: DSSC; NB2O5 BLOCKING LAYER; PHOTOCURRENT-VOLTAGE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4843

Publication date: August 1, 2011

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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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