Crystal formation involving 1-methylbenzimidazole in iodide/triiodide electrolytes for dye-sensitized solar cells

N heterocyclic compds., such as N-methylbenzimidazole (MBI), are commonly used as additives to electrolytes for dye-sensitized solar cells (DSCs), but the chem. transformation of additives in electrolyte solns. remains poorly understood. Solid cryst. compd. (MBI)6(MBI-H+)2(I-)(I3-) (1) was isolated from different electrolytes for DSCs contg. MBI as additive. The crystal structure of 1 was detd. by single-crystal x-ray diffraction. In the crystal structure, 1 contains neutral and protonated MBI fragments; iodide and triiodide anions form infinite chains along the crystallog. a-axis. The role of the solvent and additives in the crystn. process in electrolytes is discussed.


Published in:
Solar Energy Materials & Solar Cells, 91, 1062-1065
Year:
2007
ISSN:
0927-0248
Keywords:
Laboratories:




 Record created 2015-07-06, last modified 2018-03-17


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