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Issue 83, 2014
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Bragg grating nanostructuring of the TiO2 layer in dye sensitized solar cells: an efficient method to enhance light harvesting

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Abstract

In this paper, we report an experimental procedure for active layer nanostructuring in Dye Sensitized Solar Cells (DSCs) to enhance light harvesting. A Bragg grating has been realized on a high performance commercial photoresist by means of the Laser Interference Lithography (LIL) technique. Subsequently this structure has been replicated by a Soft Lithographic process on a polydimethylsiloxane (PDMS) mold, which finally allowed the direct imprinting of the DSC's titania layer under UV illumination. Morphological analysis demonstrated a successful pattern transfer over a large area. Spectroscopic and photovoltaic measurements have been performed on nanostructured and traditional bare DSCs. In the spectral range 500–750 nm the patterned cell showed a lower transmission and reflection indicating that the grating acts efficiently as a light harvesting element. IV and Incident Photon to Current Efficiency (IPCE) characterization showed an enhancement of 31% of the cell efficiency, confirming the effectiveness of this method.

Graphical abstract: Bragg grating nanostructuring of the TiO2 layer in dye sensitized solar cells: an efficient method to enhance light harvesting

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Publication details

The article was received on 29 Jul 2014, accepted on 04 Sep 2014 and first published on 05 Sep 2014


Article type: Paper
DOI: 10.1039/C4RA07785G
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Citation: RSC Adv., 2014,4, 43828-43833
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    Bragg grating nanostructuring of the TiO2 layer in dye sensitized solar cells: an efficient method to enhance light harvesting

    L. D'Amico, D. Colonna, R. De Angelis, M. Casalboni, F. De Matteis, A. Di Carlo and P. Prosposito, RSC Adv., 2014, 4, 43828
    DOI: 10.1039/C4RA07785G

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