19 September 2011 Efficient high surface area vertically aligned metal oxide nanostructures for dye-sensitized photoanodes by pulsed laser deposition
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Abstract
Vertically aligned bundles of TiO2 nanocrystals were fabricated by pulsed laser deposition (PLD) and tested as a photoanode material in dye sensitized solar cells (DSSC) using scanning electron microscopy (SEM), light absorption spectroscopy (UV-Vis), and incident photon-to-current efficiency (IPCE) experiments. An optimal background pressure of oxygen during deposition was discovered to produce a photoanode structure that simultaneously achieves high surface area and improves charge transport for enhanced photoelectrochemical performance. UV-Vis studies show that there is a 1.4x enhancement of surface area for PLD-TiO2 photoanodes compared to the best sol-gel films. PLD-TiO2 DSSC IPCE values are comparable to 3x thicker sol-gel films and nearly 92% APCE values have been observed for optimized structures.
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Rudresh Ghosh, Rudresh Ghosh, M. Kyle Brennaman, M. Kyle Brennaman, Javier J. Concepcion, Javier J. Concepcion, Kenneth Hanson, Kenneth Hanson, Amar S. Kumbhar, Amar S. Kumbhar, Thomas J. Meyer, Thomas J. Meyer, René Lopez, René Lopez, } "Efficient high surface area vertically aligned metal oxide nanostructures for dye-sensitized photoanodes by pulsed laser deposition", Proc. SPIE 8109, Solar Hydrogen and Nanotechnology VI, 81090U (19 September 2011); doi: 10.1117/12.893073; https://doi.org/10.1117/12.893073
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