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首页> 外文期刊>Advanced Functional Materials >The Impact of Interfacial Mixing on Foerster Transfer at Conjugated Polymer Heterojunotions
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The Impact of Interfacial Mixing on Foerster Transfer at Conjugated Polymer Heterojunotions

机译：界面混合对共轭聚合物杂聚结点上的酯交换的影响

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摘要

Neutron reflectivity and photoluminescence measurements are reported on bilayers of polyfluorene-based conjugated polymers. By using a novel thermal processing procedure it is possible to control the width of the interface between poly(9,9-dioctylfluorene) (F8) and poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), and measure the impact of interfacial roughness on the resonant energy transfer of excitons at the interface (Foerster transfer). It is found that increasing the root mean square (rms) roughness of the F8/F8BT interface over the range of ～1 nm to ～5 nm leads to a greatly enhanced Forster transfer from F8 to F8BT molecules. By comparing photoluminescence measurements with simple calculations it is concluded that the level of enhancement of the F8BT peak at rough interfaces can only be adequately explained if mixing of F8 and F8BT at a molecular level dominates over the interfacial roughness due to thermally excited capillary waves.
机译：在基于聚芴的共轭聚合物的双层上报道了中子反射率和光致发光测量。通过使用新颖的热处理程序，可以控制聚（9,9-二辛基芴）（F8）和聚（9,9-二辛基芴-alt-苯并噻二唑）（F8BT）之间的界面宽度，并测量其影响界面粗糙度对激子在界面上的共振能量转移（福斯特转移）的影响。发现在约1 nm至约5 nm范围内增加F8 / F8BT界面的均方根（rms）粗糙度会导致从F8到F8BT分子的Forster转移大大增强。通过将光致发光测量结果与简单的计算结果进行比较，得出的结论是，只有在分子水平上的F8和F8BT的混合在热激毛细管波的作用下超过界面粗糙度时，才能充分解释粗糙界面上F8BT峰的增强水平。

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  • 来源
    《Advanced Functional Materials》 |2009年第1期|157-163|共7页
  • 作者

    Anthony M. Higgins; Ashley Cadby; David G. Lidzey; Robert M. Dalgliesh; Mark Geoghegan; Richard A. L. Jones; Simon J. Martin; Sasha Y. Heriot;

  • 作者单位

    Multidisciplinary Nanotechnology Centre School of Engineering, Swansea University Singleton Park, Swansea, SA2 8PP (UK);

    Department of Physics and Astronomy University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH (UK);

    Department of Physics and Astronomy University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH (UK);

    ISIS, Rutherford Appleton Laboratory Didcot, OX11 0QX (UK);

    Department of Physics and Astronomy University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH (UK);

    Department of Physics and Astronomy University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH (UK);

    Department of Physics and Astronomy University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH (UK) Institute of Polymer Technology and Materials Engineering (IPTME), Loughborough University, Loughborough LEU 3TU, (UK);

    Department of Physics and Astronomy University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH (UK) Chamelic Ltd. Leeds Innovation Centre, 103 Clarendon Road, Leeds LS2 9DF (UK);

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