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Materials, Volume 12, Issue 24 (December-2 2019) – 223 articles
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Cover Story (view full-size image) By systematic tuning of the components of the electrolyte, the performances of dye-sensitized solar [...] Read more. By systematic tuning of the components of the electrolyte, the performances of dye-sensitized solar cells (DSCs) with an N-heterocyclic carbene iron(II) dye have been significantly improved. An increased Li+ ion concentration in the electrolyte leads to photoconversion efficiencies (PCEs) up to 0.66% for fully masked cells (representing 11.8% relative to 100% set for N719) due to an increased short-circuit current density (JSC). The length of the alkyl chain in 1-alkyl-3-methylimidazolium iodide ionic liquids also affects DSC performance. Electrochemical impedance spectroscopic investigations support the trends in JSC and open-circuit voltage (VOC) parameters. The influence of the counterion in the ionic liquid in the electrolyte has also been investigated. View this paper.