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.

Citation Download Citation

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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