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Tunable White-Light Emission from Conjugated Polymer-Di-Ureasil Materials

机译：共轭高分子二尿素材料的可调白光发射

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摘要

Conjugated polymer (CP)-di-ureasil composite materials displaying a tunable emission color from blue to yellow through white have been prepared using a simple sol-gel processing method. The tunability of the emission color arises from a combination of energy transfer between the di-ureasil and the CP dopant and the excitation wavelength dependence of the di-ureasil emission. Incorporation of the CP does not adversely affect the bulk or local structure of the di-ureasil, enabling retention of the structural and mechanical properties of the host. Furthermore, CP-di-ureasils display superior thermal and photostability compared to the parent CPs. Thermogravimetric analysis shows that the onset of thermal decomposition can be increased by up to 130 degrees C for CP-di-ureasils, while photostability studies reveal a significant decrease in the extent of photodegradation. Steady-state photoluminescence spectroscopy and picosecond time-resolved emission studies indicate that the observed tunable emission arises as a consequence of incomplete energy transfer between the di-ureasil and the CP dopant, resulting in emission from both species on direct excitation of the di-ureasil matrix. The facile synthetic approach and tunable emission demonstrate that CP-di-ureasils are a highly promising route to white-light-emitters that simultaneously improve the stability and reduce the complexity of CP-based multilayer device architectures.
机译：使用简单的溶胶-凝胶加工方法已经制备了共轭聚合物（CP）-二脲复合材料，其显示出从蓝色到黄色到白色的可调发射颜色。发射颜色的可调性是由于双脲与CP掺杂剂之间的能量转移与双脲发射的激发波长相关性而产生的。 CP的掺入不会不利地影响双脲的整体或局部结构，从而能够保留主体的结构和机械性能。此外，与母体CP相比，CP-二脲类具有更好的热稳定性和光稳定性。热重分析表明，对于CP-二脲类化合物，热分解的起始温度最多可提高130摄氏度，而光稳定性研究则表明光降解程度显着降低。稳态光致发光光谱和皮秒时间分辨发射研究表明，观察到的可调谐发射是由于双脲与CP掺杂剂之间的能量转移不完全而导致的，导致在直接激发双脲时两种物质都产生了发射矩阵。简便的合成方法和可调发射表明，CP-二脲是通向白光发射器的极有希望的途径，该方法可同时提高稳定性并降低基于CP的多层器件架构的复杂性。

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  • 来源
    《Advanced Functional Materials》 |2016年第4期|532-542|共11页
  • 作者

    Willis-Fox Niamh; Kraft Mario; Arlt Jochen; Scherf Ullrich; Evans Rachel C.;

  • 作者单位

    Univ Dublin Trinity Coll, Sch Chem, Dublin 2, Ireland|Univ Dublin Trinity Coll, CRANN, Dublin 2, Ireland;

    Berg Univ Wuppertal, Makromol Chem, D-42097 Wuppertal, Germany;

    Univ Edinburgh, Sch Phys & Astron, Collaborat Opt Spect Micromanipulat & Imaging Ctr, Kings Bldg, Edinburgh EH9 3JZ, Midlothian, Scotland|Univ Edinburgh, Sch Phys & Astron, SUPA, Kings Bldg, Edinburgh EH9 3JZ, Midlothian, Scotland;

    Berg Univ Wuppertal, Makromol Chem, D-42097 Wuppertal, Germany;

    Univ Dublin Trinity Coll, Sch Chem, Dublin 2, Ireland|Univ Dublin Trinity Coll, CRANN, Dublin 2, Ireland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    composites; conjugated polymers; hybrid materials; optically active materials; photoluminescence;

    机译：复合材料;共轭聚合物;混合材料;光学活性材料;光致发光;

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