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Fundamentals of Materials Selection for Light-Emitting Electrochemical Cells

机译：用于发光电化学电池的材料选择基础

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摘要

The in situ formation of a light-emitting p-n or p-i-n junction in light-emitting electrochemical cells (LECs) necessitates mixed ionic-electronic conductors in the active layer. This unique characteristic requires electronic, luminescent, and ionic ingredients that work synergistically in the LECs. The material requirements that lead to promising electroluminescent properties are discussed and the important components reported so far are surveyed. Particular attention is paid to the working mechanisms behind junction formation and stabilization to create efficient and stable electroluminescence in conjugated-polymer-based LECs. Keeping these fundamentals in mind explains how LEC devices have evolved from classic conjugated polymer blends into highly stable crosslinked, hybrid composite, and stretchable device architectures. To conclude, a future development strategy is proposed based on a dual approach: develop new materials specifically for LEC devices and explore novel ways to efficiently process and stabilize the p-i-n junction, which will drive improvements in both LEC external quantum efficiency and operating lifetime toward truly low-cost solid-state lighting applications.
机译：发光电化学电池（LECs）中的发光P-N或P-I-N结的原位形成需要在有源层中的混合离子电子导体。这种独特的特点需要在LEC中协同工作的电子，发光和离子成分。讨论了导致有望的电致发光性能的材料要求，并调查了迄今为止报告的重要组成部分。特别注意结合形成和稳定化的工作机制，以在共轭聚合物的LEC中产生高效稳定的电致发光。在心中保持这些基本面解释了LEC器件如何从经典共轭聚合物共混成高度稳定的交联，混合复合材料和可拉伸的装置架构。要得出结论，基于双重方法提出了未来的发展战略：开发专门为LEC设备开发新材料，并探索有效地处理和稳定PIN交界的新方法，这将推动LEC外部量子效率和朝向真正的运营寿命的改进低成本固态照明应用。

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  • 来源
    《Advanced Functional Materials》 |2020年第33期|1909102.1-1909102.27|共27页
  • 作者

    Youssef Kareem; Li Ying; OKeeffe Samantha; Li Lu; Pei Qibing;

  • 作者单位

    Univ Calif Los Angeles Soft Mat Res Lab Dept Mat Sci & Engn Henry Samueli Sch Engn & Appl Sci Los Angeles CA 90015 USA;

    Chongqing Univ Arts & Sci Res Inst New Mat & Technol Coinnovat Ctr Micro Nano Optoelect Mat & Devices Chongqing 402160 Peoples R China;

    Univ Calif Los Angeles Soft Mat Res Lab Dept Mat Sci & Engn Henry Samueli Sch Engn & Appl Sci Los Angeles CA 90015 USA;

    Chongqing Univ Arts & Sci Res Inst New Mat & Technol Coinnovat Ctr Micro Nano Optoelect Mat & Devices Chongqing 402160 Peoples R China;

    Univ Calif Los Angeles Soft Mat Res Lab Dept Mat Sci & Engn Henry Samueli Sch Engn & Appl Sci Los Angeles CA 90015 USA;

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  • 正文语种 eng
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  • 关键词

    electroluminescence; electrolytes; light-emitting conjugated polymers; light-emitting electrochemical cells; p-i-n junction formation;

    机译：电致发光;电解质;发光共轭聚合物;发光电化学电池;P-I-n结形成;

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