首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Targeted design leads to tunable photoluminescence from perylene dicarboxdiimide-poly(oxyalkylene)/siloxane hybrids for luminescent solar concentrators
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Targeted design leads to tunable photoluminescence from perylene dicarboxdiimide-poly(oxyalkylene)/siloxane hybrids for luminescent solar concentrators

机译:有针对性的设计导致用于发光太阳能聚光器的per二碳二亚胺-聚(氧化烯)/硅氧烷杂化物的可调光致发光

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摘要

A series of organic-inorganic hybrid materials in which a perylene carboxdiimide-bridged triethoxysilane (PDI-Sil) is covalently grafted to the siliceous domains of poly(oxyalkylene)/siloxane hybrids from the ureasil family has been synthesised (PDI-Sil-ureasils), with the aim of tailoring the optical properties towards their future application in luminescent solar concentrators (LSCs). Steady-state and time-resolved photoluminescence studies revealed that the ureasil host is able to isolate PDI-Sil, which inhibits the formation of aggregates. The ureasil also functions as an active host, with its intrinsic photoluminescence contributing to the optical properties of the hybrid material. Through strategic variation of the branching and molecular weight of the poly(oxyalkylene) backbone, it was shown that the efficiency of energy transfer from the ureasil host to the PDI-Sil can be modulated, which tunes the emission colour from pink to orange. The chain length, rather than the number of branches, on the poly(oxyalkylene) backbone was shown to influence the photoluminescence most significantly. Since ureasils demonstrate waveguiding properties, the results indicate that covalent grafting of a fluorophore directly to a waveguide host may provide an attractive route to more efficient LSCs.
机译:合成了一系列有机-无机杂化材料,其中已合成per二甲酰亚胺桥联的三乙氧基硅烷(PDI-Sil)共价接枝到尿素族的聚(氧化烯)/硅氧烷杂化体的硅质结构域上(PDI-Sil-ureasils) ,旨在使光学性能适应其在发光太阳能集中器(LSC)中的未来应用。稳态和时间分辨的光致发光研究表明,尿素主体可以分离PDI-Sil,从而抑制聚集体的形成。尿素硅还充当活性主体,其固有的光致发光有助于杂化材料的光学性能。通过对聚氧亚烷基主链的支化和分子量的策略性变化,表明可以调节从脲硅主体到PDI-Sil的能量转移效率,从而将发射颜色从粉红色变为橙色。聚(氧化烯)主链上的链长而不是支链数显示出对光致发光的影响最大。由于脲硅酮具有导波性能,因此结果表明,将荧光团直接共价接枝到波导主体上可能为吸引更有效的LSC提供诱人的途径。

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