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Available from: Matt Griffith, Sep 26, 2015
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    ABSTRACT: Co-sensitization of nanocrystalline TiO2 with the organic dye D2 and the zinc phthalocyanine dye TT1 improves light harvesting, Jsc and efficiency of DSC devices. However, the Voc of the co-sensitized cell is markedly inferior ([similar]130 mV) when compared to the reference device made with D2 only. We discuss the implications of our results with regard to selection criteria for dyes for co-sensitized DSCs.
    Journal of Materials Chemistry 01/2011; DOI:10.1039/C0JM03661G · 7.44 Impact Factor
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    ABSTRACT: We present a device based study into the operation of liquid electrolyte dye-sensitized solar cells (DSSC's) using organic dyes. We find that, for these systems, it is entirely necessary to employ a compact TiO2 layer between the transparent fluorine doped SnO2 (FTO) anode and the electrolyte in order to reduce charge recombination losses. By incorporation of a compact layer, the device efficiency can be increased by over 160% under simulated full sun illumination and more than doubled at lower light intensities. This is strong evidence that the more widely employed ruthenium based sensitizers act as to "insulate" the anode against recombination losses and that many planar organic dyes employed in DSSC's could greatly benefit from the use of a compact TiO2 blocking layer. This is in strong contrast to DSSC's sensitized with ruthenium based systems, where the introduction of compact TiO2 has only marginal effects on conversion efficiencies.
    Nano Letters 05/2008; 8(4):977-81. DOI:10.1021/nl071588b · 13.59 Impact Factor
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    ABSTRACT: Dye-sensitized solar cells (DSCs) using titanium dioxide (TiO2) electrodes with different haze were investigated. It was found that the incident photon to current efficiency (\mathit{IPCE}) of DSCs increases with increase in the haze of the TiO2 electrodes, especially in the near infrared wavelength region. Conversion efficiency of 11.1%, measured by a public test center, was achieved using high haze TiO2 electrodes. This indicates that raising the haze of TiO2 electrodes is an effective technique for improvement of conversion efficiency.
    Japanese Journal of Applied Physics 07/2006; 45(25):L638-L640. DOI:10.1143/JJAP.45.L638 · 1.13 Impact Factor
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