Efficient high surface area vertically aligned metal oxide nanostructures for dye-sensitized photoanodes by pulsed laser deposition

Rudresh Ghosh; M. Kyle Brennaman; Javier J. Concepcion; Kenneth Hanson; Amar S. Kumbhar; Thomas J. Meyer; René Lopez

doi:10.1117/12.893073

19 September 2011 Efficient high surface area vertically aligned metal oxide nanostructures for dye-sensitized photoanodes by pulsed laser deposition

Rudresh Ghosh, M. Kyle Brennaman, Javier J. Concepcion, Kenneth Hanson, Amar S. Kumbhar, Thomas J. Meyer, René Lopez

Author Affiliations +

Proceedings Volume 8109, Solar Hydrogen and Nanotechnology VI; 81090U (2011) https://doi.org/10.1117/12.893073
Event: SPIE Solar Energy + Technology, 2011, San Diego, California, United States

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, M. Kyle Brennaman, Javier J. Concepcion, Kenneth Hanson, Amar S. Kumbhar, Thomas J. Meyer, and 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); https://doi.org/10.1117/12.893073

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