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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of novel soluble alternating copoly(phenylene vinylene) derivative for light-emitting electrochemical cell
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Synthesis and characterization of novel soluble alternating copoly(phenylene vinylene) derivative for light-emitting electrochemical cell

机译：用于发光电化学电池的新型可溶性交替共聚（亚苯基亚乙烯基）衍生物的合成与表征

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摘要

A novel alternating copolymer, poly([2,5-di(2-(2-ethoxy ethoxy)ethoxy)-1,4-phenylene vinylene]-alt1,4-[phenylene vinylene)], has been synthesized through the Wittig condensation as electroluminescent material. In this copolymer, one component is phenylene vinylene with flexible oligo(ethylene oxide) side chain that facilitates ion transportation and phase miscibility between nonpolar and polar part of composite luminescent layer, and another is a rigid phenylene vinylene moiety to improve luminescent quantum efficiency and tune color. The copolymer shows good solubility and thermal stability for device fabrication compared to poly(phpeylene vinylene)(PPV). The band gap value of copolymer is between those of corresponding homopolymers, which indicates that alternating copolymerization is a suitable way to obtain luminescent polymer with desired band gap. The maximum wavelength of photoluminescence of copolymer is 539 nm (yellowish-green). The HOMO and LUMO energy levels obtained by cyclic voltammetry measurement indicate that the electron injection ability of copolymer has been greatly improved compared with that of the PPV. A more balanced carrier injection and higher quantum efficiency are proved by electroluminescent properties of corresponding light-emitting devices. The turn-on voltage of LEC device (ITO/copolymer + PEO + Li-CIO4/Al) is found to be 2.3 V, with current comparative to LED (ITO/ copolymer /Al) at 9.5 V. (C) 2003 Wiley Periodicals, Inc. [References: 29]
机译：通过维蒂希缩合反应合成了一种新型的交替共聚物，聚[[2,5-二（2-（2-（2-乙氧基乙氧基）乙氧基）-1,4-亚苯基亚乙烯基] -alt1,4- [亚苯基亚乙烯基]]。作为电致发光材料。在该共聚物中，一种组分是带有柔性低聚（环氧乙烷）侧链的亚苯基亚乙烯基，有助于在复合发光层的非极性和极性部分之间进行离子迁移和相混溶，另一种组分是刚性亚苯基亚乙烯基，以提高发光量子效率和调谐颜色。与聚（1,2-戊二烯-亚乙烯基）（PPV）相比，该共聚物对器件制造显示出良好的溶解性和热稳定性。共聚物的带隙值介于相应的均聚物的带隙值之间，这表明交替共聚是获得具有所需带隙的发光聚合物的合适方法。共聚物的最大光致发光波长为539 nm（黄绿色）。通过循环伏安法测量获得的HOMO和LUMO能级表明，与PPV相比，共聚物的电子注入能力有了很大提高。相应的发光器件的电致发光特性证明了更平衡的载流子注入和更高的量子效率。发现LEC器件（ITO /共聚物+ PEO + Li-CIO4 / Al）的开启电压为2.3 V，与LED（ITO /共聚物/ Al）的电流为9.5V。（C）2003 Wiley期刊，Inc. [参考：29]

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