6533b7dcfe1ef96bd12728ff

RESEARCH PRODUCT

Quaternary ammonium polyiodides as ionic liquid/soft solid electrolytes in dye-sensitized solar cells

Jani KallioinenJouko Korppi-tommolaHenriette Santa-nokkiManu LahtinenSara Busi

subject

General Chemical EngineeringInorganic chemistryGeneral Physics and Astronomychemistry.chemical_elementGeneral ChemistryElectrolyteIodinechemistry.chemical_compoundPolyiodideDye-sensitized solar cellchemistryIonic liquidMelting pointFast ion conductorAmmonium

description

Abstract Four new quaternary ammonium iodides, (Me 2 Pe 2 N)I, (Me 2 Hex 2 N)I, (Et 2 Pe 2 N)I and (Et 2 Hex 2 N)I, were synthesized and studied as electrolytes in dye-sensitized solar cells. All compounds were solids at room temperature. Influence of varying amounts of elemental iodine and the effect of tert -butylpyridine (TBP) on the performance of the cell was also studied. Addition of iodine lowered the melting points of the resulting polyiodides. From the ammonium iodides only (Me 2 Hex 2 N)I:I 2 (10:1) was liquid at the room temperature and the others were soft solids. Under illumination from a halogen lamp source at 10 mW cm −2 intensity, the highest power conversion efficiency of 2.4% was obtained with the (Me 2 Hex 2 N)I:I 2 (10:1) liquid electrolyte containing TBP, which may be compared to an efficiency of 5.4% obtained from similar cells with traditional 3-methoxypropionitrile based electrolyte tested under identical conditions. The best efficiency with soft solid electrolyte, (Et 2 Hex 2 N)I:I 2 (10:1) with TBP, was 2.3%.

yearjournalcountryeditionlanguage
2007-02-01Journal of Photochemistry and Photobiology A: Chemistry
https://doi.org/10.1016/j.jphotochem.2006.07.008