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Tunable Emission From Composite Polymer Nanoparticles Basedon Resonance Energy Transfer

机译:基于共振能量转移的复合聚合物纳米粒子的可调发射

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摘要

We have fabricated semiconducting polymer nanoparticles from poly[2-methoxy-5-(2'-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV), poly(N-vinylcarbazole) (PVK), and their blends via a reprecipitation method. When excited by the peak wavelength of the PVK absorption band, the polymer nanoparticles show enhanced emission from the MEH-PPV component. The emission color can be tuned from blue to orange-red by varying the content of the MEH-PPV component in the composite nanoparticles. Since the PVK nanoparticles have a wide photoluminescence (PL) spectrum, which overlaps well with the absorption band of the MEH-PPV nanoparticles, the PL enhancement is considered to be due to Forster energy transfer from PVK to MEH-PPV in the composite nanoparticles. Time-resolved fluorescence examinations confirm our assignment. These polymer nanoparticles are expected to have potential applications in future nano-optoelectronics.
机译:我们已经通过聚[2-甲氧基-5-(2'-乙基-己氧基)-对亚苯基亚乙烯基](MEH-PPV),聚(N-乙烯基咔唑)(PVK)及其共混物制备了半导体聚合物纳米颗粒再沉淀法。当被PVK吸收带的峰值波长激发时,聚合物纳米颗粒显示出来自MEH-PPV组分的增强的发射。通过改变复合纳米颗粒中MEH-PPV组分的含量,可以将发射颜色从蓝色调整为橙红色。由于PVK纳米粒子具有宽的光致发光(PL)光谱,该光谱与MEH-PPV纳米粒子的吸收带良好重叠,因此PL增强被认为是由于复合纳米粒子中从PVK到MEH-PPV的Forster能量转移。时间分辨荧光检查确认了我们的任务。这些聚合物纳米粒子有望在未来的纳米光电子学中具有潜在的应用。

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