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首页> 外文期刊>Advanced Functional Materials >The Origin of Green Emission in Polyfluorene-Based Conjugated Polymers: On-Chain Defect Fluorescence
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The Origin of Green Emission in Polyfluorene-Based Conjugated Polymers: On-Chain Defect Fluorescence

机译：聚芴基共轭聚合物中绿色发射的起源：链上缺陷荧光

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摘要

The low emission band at 2.2-2.3 eV in polyfluorene-based conjugated materials is studied by various spectroscopic methods on defined copolymers of 9-9'-difarnesyl-fluorene with 9-fluorenone, which can be seen as a model compound for degraded polyfluorenes. Absorption, electroluminescence, and photoluminescence in the film (temperature-dependent) and solution (room temperature) reveal the optical properties of this low-energy emission band emerging in polyfluorene-type polymers upon degradation. All the experimental evidence presented yield direct evidence against excimer or aggregate formation as the primary source of the low-energy emission band. Instead keto defect sites can be shown to be responsible for the emissive defect.
机译：通过多种光谱方法研究了9-9'-二法呢基芴与9-芴酮的确定共聚物，从而研究了聚芴类共轭材料在2.2-2.3 eV处的低发射带，可以将其视为降解聚芴的模型化合物。薄膜（取决于温度）和溶液（室温）中的吸收，电致发光和光致发光揭示了降解后聚芴类聚合物中出现的该低能发射带的光学性质。提出的所有实验证据都直接证明了准分子或聚集体形成是低能发射谱带的主要来源。相反，可以证明酮缺陷位点是造成发射缺陷的原因。

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  • 来源
    《Advanced Functional Materials》 |2003年第8期|p. 597-601|共5页
  • 作者

    Lorenz Romaner; Alexander Pogantsch; Patricia Scandiucci de Freitas; Ullrich Scherf; Martin Gall; Egbert Zojer; Emil J. W. List;

  • 作者单位

    Christian Doppler Laboratory Advanced Functional Materials Institute of Nanostructured Materials and Photonics Joanneum Research, A-8160 Weiz Austria;

    Institute of Solid State Physics, Graz University of Technology Petersgasse 16/I/108, A-8010 Austria;

    Bergische Universitat Wuppertal Makromolekular Chemie, Fachbereich Chemie GauB-Str. 20, D-42097, Wuppertal Germany;

    Bergische Universitat Wuppertal Makromolekular Chemie, Fachbereich Chemie GauB-Str. 20, D-42097, Wuppertal Germany;

    Christian Doppler Laboratory Advanced Functional Materials Institute of Nanostructured Materials and Photonics Joanneum Research, A-8160 Weiz Austria;

    Department of Chemistry, The University of Arizona 1306 East University Blvd., Tucson, Arizona 85721-0041 USA;

    Christian Doppler Laboratory Advanced Functional Materials Institute of Nanostructured Materials and Photonics Joanneum Research, A-8160 Weiz Austria;

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  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
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