Novel cyclotetrasiloxane tetraimidazolium salts as high performance quasi-solid state electrolyte for dye-sensitized solar cells

Autor: Sang Young Lee, Whangi Kim, Young Tae Jeon, Hyun Ho Joo, Youngdon Lim, Jin Seong Lim, Soonho Lee, Dong Wan Seo
Rok vydání: 2013
Předmět:
Zdroj: Macromolecular Research. 21:732-737
ISSN: 2092-7673
1598-5032
DOI: 10.1007/s13233-013-1094-6
Popis: A new type of quasi-state ionics based on cyclosiloxane imidazolium iodides was synthesized and used as electrolytes in dye-sensitized solar cells (DSSCs). The cyclosiloxane electrolyte formed a distinctive cavity in the center of the molecule, and the cyclic Si-O linkages were surrounded with bulky tetraimidazolium salts on the outside. The resulting electrolytes were characterized by 1H nuclear magnetic resonance (NMR) spectroscopy and thermogravimetric analysis (TGA). The electrolytes exhibited dark brown quasi-solid state, high viscosity, and excellent long term stability. The cell efficiency tended to depend on the chain length of the electrolyte, and was slightly higher in the propylimidazolium electrolyte (ηmax=8.2%) than in the methylimidazolium one. The superior long-term stability of the fabricated, cyclosiloxane electrolyte-based DSSCs demonstrated that they hold great promise in overcoming the current issues affecting on cell performance. Open image in new window
Databáze: OpenAIRE
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