More Efficient Dye-Sensitized Solar Cells

  • Author: ChemViews
  • Published Date: 03 June 2013
  • Source / Publisher: ChemSusChem/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: More Efficient Dye-Sensitized Solar Cells

Related Societies

The efficiency of dye-sensitized solar cells (DSSCs) is generally higher under low or moderate light intensities than that of conventional semiconductor photovoltaic devices. This makes them attractive for use indoors or under cloudy conditions. To maintain efficient charge generation under low light conditions, a blocking layer (BL) is essential. Often a thin insulating or semiconducting layer typically of TiO2 is used between the transparent conductive oxide and the mesoporous TiO2 to block electron/hole recombination at the conducting oxide/electrolyte interface.

Gregory N. Parsons, North Carolina State University, Raleigh, NC, USA, and colleagues show that atomic layer deposition (ALD) can produce ultrathin (<10 nm) BLs that significantly impede charge recombination in functional DSSCs. This leads to improved photocurrents, open-circuit photovoltages, and fill factors which results in an increase in the overall efficiency from ≈7% to ≈8.4% under AM 1.5G illumination (solar simulation spectrum). These ALD BLs are the thinnest optimized DSSC BLs reported to date.

By preparing BLs through other deposition techniques, the team demonstrate that ALD results in better performance, even with thinner films, which is ascribed to the lower pinhole density of ALD materials.

Article Views: 3751

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH