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首页> 外文期刊>Advanced Functional Materials >Highly Efficient Circularly Polarized Electroluminescence from Aggregation-Induced Emission Luminogens with Amplified Chirality and Delayed Fluorescence
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Highly Efficient Circularly Polarized Electroluminescence from Aggregation-Induced Emission Luminogens with Amplified Chirality and Delayed Fluorescence

机译：聚合诱导的发光手性和手性和延迟荧光的高效诱导的圆偏振电致发光。

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摘要

Development of highly efficient circularly polarized organic light-emitting diodes (CPOLEDs) has gained increasing interest as they show improved luminous efficiency and high contract 3D images in OLED displays. In this work, a series of binaphthalene-containing luminogenic enantiomers with aggregation-induced emission (AIE) and delayed fluorescence properties is designed and synthesized. These molecules can emit from green to red light depending on the solvent polarity due to the twisted intramolecular charge transfer effect. However, their solid powders show bright light emissions, demonstrating a phenomenon of AIE. All the molecules exhibit Cotton effects and circularly polarized luminescence in toluene solution and films. Multilayer CPOLEDs using the doped and neat films of the molecules as emitting layers are fabricated, which exhibit high external quantum efficiency of up to 9.3% and 3.5% and electroluminescence dissymmetry factor (g(EL)) of up to +0.026/-0.021 and +0.06/-0.06, respectively. Compared with doped CPOLEDs, the nondoped ones show higher g(EL) and much smaller current efficiency roll-off due to the stronger AIE effect. By altering the donor unit, the electroluminescence maximum of the doped film can vary from 493 to 571 nm. As far as it is known, this is the first example of efficient CPOLEDs based on small chiral organic molecules.
机译：高效圆极化有机发光二极管（CPOLED）的开发引起了越来越多的兴趣，因为它们在OLED显示器中显示出更高的发光效率和高对比度3D图像。在这项工作中，设计和合成了一系列具有聚集诱导发射（AIE）和延迟荧光特性的含双萘的发光对映体。由于扭曲的分子内电荷转移效应，取决于溶剂极性，这些分子可以从绿光发射到红光。然而，它们的固体粉末显示出明亮的光发射，表明了AIE现象。所有分子在甲苯溶液和薄膜中均表现出棉花效应和圆极化发光。制备了使用分子的掺杂和纯净膜作为发射层的多层CPOLED，它们具有高达9.3％和3.5％的高外部量子效率以及高达+ 0.026 / -0.021的电致发光不对称系数（g（EL））和分别为+ 0.06 / -0.06。与掺杂的CPOLED相比，未掺杂的CPOLED显示出更高的g（EL），并且由于AIE效应更强，因此电流效率下降幅度小得多。通过改变施主单元，掺杂膜的最大电致发光可以在493nm至571nm之间变化。据了解，这是基于小的手性有机分子的高效CPOLED的第一个示例。

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  • 来源
    《Advanced Functional Materials》 |2018年第17期|1800051.1-1800051.12|共12页
  • 作者

    Song Fengyan; Xu Zeng; Zhang Qiushuo; Zhao Zheng; Zhang Haoke; Zhao Weijun; Qiu Zijie; Qi Chunxuan; Zhang Han; Sung Herman H. Y.; Williams Ian D.; Lam Jacky W. Y.; Zhao Zujin; Qin Anjun; Ma Dongge; Tang Ben Zhong;

  • 作者单位

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    South China Univ Technol, NSFC Ctr Luminescence Mol Aggregates, SCUT HKUST Joint Res Inst, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    HKUST Shenzhen Res Inst, South Area, 9 Yuexing 1st RD,Hitech Pk, Shenzhen 518057, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    South China Univ Technol, NSFC Ctr Luminescence Mol Aggregates, SCUT HKUST Joint Res Inst, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, NSFC Ctr Luminescence Mol Aggregates, SCUT HKUST Joint Res Inst, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

    South China Univ Technol, NSFC Ctr Luminescence Mol Aggregates, SCUT HKUST Joint Res Inst, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, NSFC Ctr Luminescence Mol Aggregates, SCUT HKUST Joint Res Inst, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, NSFC Ctr Luminescence Mol Aggregates, SCUT HKUST Joint Res Inst, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    Hong Kong Univ Sci & Technol, Res Ctr Tissue Restorat & Reconstruct, Dept Chem, Hong Kong Branch Chinese Natl Engn, Kowloon 999077, Hong Kong, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    aggregation-induced emission; chiral; circularly polarized luminescence; circularly polarized organic light-emitting diodes; delayed fluorescence;

    机译：聚集诱导发射;手性;圆偏振发光;圆偏振有机发光二极管;荧光延迟;

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