A supercooled imidazolium iodide ionic liquid as a low-viscosity electrolyte for dye-sensitized solar cells
A supercooled imidazolium iodide ionic liquid as a low-viscosity electrolyte for dye-sensitized solar cells
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DOI：
10.1021/ic061232n
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发表时间：
2006-12-25
影响因子：
4.6
通讯作者：
Dyson, Paul J.
中科院分区：
文献类型：
--
作者：
Fei, Zhaofu;Kuang, Daibin;Dyson, Paul J.
报道了一系列烯丙基功能化的咪唑盐，包括1-烯丙基-3-乙基咪唑碘化物和1-烯丙基-3-丙基咪唑碘盐，它们的熔点接近室温，在熔点以上加热时表现出典型的过冷流体性质。它们在液体状态下的粘度远低于太阳能电池中使用的基准离子液体，即1-丙基-3-甲基咪唑碘。在60℃的加速光浸泡试验中，含有这些新液体的电解液在染料敏化太阳能电池中提供了优异的效率和良好的稳定性。通过单晶X射线分析确定了其中三种新盐的结构为固态。
A series of allyl-functionalized imidazolium salts are reported, including 1-allyl-3-ethylimidazolium iodide and 1-allyl-3-propylimidazolium iodide, which have melting points close to room temperature and show typical properties of supercooled fluids if heated above their melting points. Their viscosities in the liquid state are considerably lower than the benchmark ionic liquid used in solar cells, viz., 1-propyl-3-methylimidazolium iodide. Electrolytes containing these new liquids provide excellent efficiencies and good stability in dye-sensitized solar cells when subjected to an accelerated-light soaking test at 60 degrees C. The structures of three of the new salts have been established in the solid state by single-crystal X-ray analysis.