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Proceedings Paper

Efficient high surface area vertically aligned metal oxide nanostructures for dye-sensitized photoanodes by pulsed laser deposition
Author(s): Rudresh Ghosh; M. Kyle Brennaman; Javier J. Concepcion; Kenneth Hanson; Amar S. Kumbhar; Thomas J. Meyer; René Lopez
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Paper 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.

Paper Details

Date Published: 19 September 2011
PDF: 6 pages
Proc. SPIE 8109, Solar Hydrogen and Nanotechnology VI, 81090U (19 September 2011); doi: 10.1117/12.893073
Show Author Affiliations
Rudresh Ghosh, The Univ. of North Carolina at Chapel Hill (United States)
M. Kyle Brennaman, The Univ. of North Carolina at Chapel Hill (United States)
Javier J. Concepcion, The Univ. of North Carolina at Chapel Hill (United States)
Kenneth Hanson, The Univ. of North Carolina at Chapel Hill (United States)
Amar S. Kumbhar, The Univ. of North Carolina at Chapel Hill (United States)
Thomas J. Meyer, The Univ. of North Carolina at Chapel Hill (United States)
René Lopez, The Univ. of North Carolina at Chapel Hill (United States)


Published in SPIE Proceedings Vol. 8109:
Solar Hydrogen and Nanotechnology VI
Yasuhiro Tachibana, Editor(s)

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