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- W2060460584 abstract "The performance of dye sensitized nanocrystalline TiO2 solar cells based on quasi-solid state PAN electrolytes containing a series of six quaternary ammonium iodide salts NH4I, Eth4NI, Prop4NI, But4NI, Pent4NI, Hex4NI with different cation sizes has been evaluated. Even though the total ionic conductivity decreases with increasing cation size from NH4I to Hex4NI, the iodide ion conductivity in the electrolytes increases with cation size. The open circuit photovoltage (Voc) of the dye sensitized solar cells also increases with cation radius. The efficiency of the DSSCs varies with cation size and exhibits a maximum for Prop4NI salt. The short circuit photo current density (Jsc) follows a similar variation with cation size, suggesting a strong correlation between the cation size dependence of efficiency and Jsc. The DSSC fabricated with tetrapropylammonium iodide exhibited the maximum efficiency of 4.30% with maximum Jsc of 10.78 mA cm−2 and a Voc of 0.746 V. The results have been interpreted on the basis of “the electrolyte effects” where Jsc is determined essentially by the iodide ion conductivity and “the electrode effects” where the Jsc and Voc are determined by the cation adsorption in the dyed TiO2 electrode and resulting electron dynamics at the semiconductor/electrolyte interface. For DSSCs with small cations, electrolyte effects appear to be dominating and rate determining while for DSSCs with larger cations, electrode effects appear to be dominating and rate determining." @default.
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- W2060460584 date "2013-10-01" @default.
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- W2060460584 title "Effect of cation size on the performance of dye sensitized nanocrystalline TiO2 solar cells based on quasi-solid state PAN electrolytes containing quaternary ammonium iodides" @default.
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- W2060460584 doi "https://doi.org/10.1016/j.electacta.2013.07.089" @default.
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