Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 633, Issue 1, Pages 146-152Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2009.05.005
Keywords
Dye-sensitized solar cell; 1-Methyl-3-propyl imidazolinium iodide; Redox behavior; Additives and solvents
Categories
Funding
- National Science Council (NSC) of Taiwan
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in this work, the influences of redox electrolyte, additives and solvents on the photovoltaic performance of dye-sensitized solar cells (DSSCs) containing 1-methyl-3-propyl-imidazolinium iodide (MPII) as the electrolyte were investigated. An optimum conductivity of 20.31 mS cm(-1) for 0.6 M MPII in acetonitrile (AN) was found out from the conductivity measurement. Diffusion coefficient of 13 and photocurrent density (J(sc)) of the DSSC varied with concentration Of I-2. Among the different inorganic and organic iodides as additives, the DSSC showed high performance with lithium iodide (Lil) and tetrabutylammonium iodide (TBAI), respectively. The performance of the DSSCs with different solvents was studied. From the EIS studies, it was inferred that the poor conversion efficiencies of the DSSCs were associated with high charge transfer resistance, noted along the TiO2/solvent interface. A high conversion efficiency of 6.7% (J(sc) of 14.8 mA cm(-2), V-oc of 0.74 V, fill factor (FF) 0.62 under one sun (AM 1.5)) was obtained for the DSSC containing the electrolyte composition of 0.6 M of MPII/0.2 M of Lil/0.06 M Of I-2/0.5 M of TBP in AN along with the incorporation of light scattering particles (TiO2 of 300 nm). (C) 2009 Elsevier B.V. All rights reserved.
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