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Nanocomposites Based on Luminescent Colloidal Nanocrystals and Polymeric Ionic Liquids towards Optoelectronic Applications

机译：基于发光胶体纳米晶体和高分子离子液体的纳米复合材料在光电领域的应用

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摘要

Polymeric ionic liquids (PILs) are an interesting class of polyelectrolytes, merging peculiar physical-chemical features of ionic liquids with the flexibility, mechanical stability and processability typical of polymers. The combination of PILs with colloidal semiconducting nanocrystals leads to novel nanocomposite materials with high potential for batteries and solar cells. We report the synthesis and properties of a hybrid nanocomposite made of colloidal luminescent CdSe nanocrystals incorporated in a novel ex situ synthesized imidazolium-based PIL, namely, either a poly(N-vinyl-3-butylimidazolium hexafluorophosphate) or a homologous PIL functionalized with a thiol end-group exhibiting a chemical affinity with the nanocrystal surface. A capping exchange procedure has been implemented for replacing the pristine organic capping molecules of the colloidal CdSe nanocrystals with inorganic chalcogenide ions, aiming to disperse the nano-objects in the PILs, by using a common polar solvent. The as-prepared nanocomposites have been studied by TEM investigation, UV-Vis, steady-state and time resolved photoluminescence spectroscopy for elucidating the effects of the PIL functionalization on the morphological and optical properties of the nanocomposites.
机译：聚合离子液体（PIL）是一类有趣的聚电解质，将离子液体的特殊物理化学特征与聚合物的柔韧性，机械稳定性和可加工性相结合。 PIL与胶态半导体纳米晶体的结合产生了新型的纳米复合材料，对电池和太阳能电池具有很高的潜力。我们报道了由掺入新型异位合成咪唑鎓基PIL的胶态发光CdSe纳米晶体制成的杂化纳米复合材料的合成和性能，即聚（N-乙烯基-3-丁基咪唑六氟磷酸盐）或用PAL功能化的同源PIL。硫醇端基与纳米晶体表面表现出化学亲和力。为了使用普通的极性溶剂将纳米物体分散在PIL中，已经实施了一种封顶交换程序，用无机硫属元素化物离子代替胶体CdSe纳米晶体的原始有机封顶分子。通过TEM研究，UV-Vis，稳态和时间分辨光致发光光谱研究了所制备的纳米复合材料，以阐明PIL功能化对纳米复合材料的形态和光学性质的影响。

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