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首页> 外文期刊>Advanced Materials >Chiral Octahydro-Binaphthol Compound-Based Thermally Activated Delayed Fluorescence Materials for Circularly Polarized Electroluminescence with Superior EQE of 32.6% and Extremely Low Efficiency Roll-Off
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Chiral Octahydro-Binaphthol Compound-Based Thermally Activated Delayed Fluorescence Materials for Circularly Polarized Electroluminescence with Superior EQE of 32.6% and Extremely Low Efficiency Roll-Off

机译：基于手性八氢联萘酚化合物的热活化延迟荧光材料，用于圆偏振电致发光，具有出色的EQE为32.6％和极低效率的滚降

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摘要

Circularly polarized organic light-emitting diodes (CP-OLEDs) are particularly favorable for the direct generation of CP light, and they demonstrate a promising application in 3D display. However, up to now, such CP devices have suffered from low brightness, insufficient efficiency, and serious efficiency roll-off. In this study, a pair of octahydro-binaphthol (OBN)-based chiral emitting enantiomers, (R/S)-OBN-Cz, are developed by ingeniously merging a chiral source and a luminophore skeleton. These chirality-acceptor-donor (C-A-D)-type and rod-like compounds concurrently generate thermally activated delayed fluorescence with a small Delta E-ST of 0.037 eV, as well as a high photoluminescence quantum yield of 92% and intense circularly polarized photoluminescence with dissymmetry factors (|g(PL)|) of approximate to 2.0 x 10(-3) in thin films. The CP-OLEDs based on (R/S)-OBN-Cz enantiomers not only display obvious circularly polarized electroluminescence signals with a |g(EL)| of approximate to 2.0 x 10(-3), but also exhibit superior efficiencies with maximum external quantum efficiency (EQE(max)) up to 32.6% and extremely low efficiency roll-off with an EQE of 30.6% at 5000 cd m(-2), which are the best performances among the reported CP devices to date.
机译：圆偏振有机发光二极管（CP-OLED）特别适合直接产生CP光，并且它们在3D显示中具有广阔的应用前景。但是，到目前为止，这种CP装置的亮度低，效率不足，效率下降严重。在这项研究中，通过巧妙地将手性来源和发光体骨架相结合，开发了一对基于八氢联萘酚（OBN）的手性发射对映体（R / S）-OBN-Cz。这些手性受体给体（CAD）型和棒状化合物同时产生热激活的延迟荧光，其Delta E-ST小，为0.037 eV，光致发光的量子产率高达92％，强圆偏振光致发光。薄膜中的不对称因子（| g（PL）|）大约为2.0 x 10（-3）。基于（R / S）-OBN-Cz对映体的CP-OLED不仅显示明显的圆偏振电致发光信号，而且| g（EL）|约为2.0 x 10（-3），但在5000 cd m（-）时表现出出众的效率，最大外部量子效率（EQE（max））高达32.6％和极低的效率滚降，EQE为30.6％ 2），这是迄今为止报告的CP设备中性能最好的。

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  • 来源
    《Advanced Materials》 |2019年第28期|1900524.1-1900524.9|共9页
  • 作者

    Wu Zheng-Guang; Han Hua-Bo; Yan Zhi-Ping; Luo Xu-Feng; Wang Yi; Zheng You-Xuan; Zuo Jing-Lin; Pan Yi;

  • 作者单位

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Univ, State Key Lab Coordinat Chem, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Adv Organ Mat,Sch Chem & Chem Eng, Nanjing 210023, Jiangsu, Peoples R China;

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  • 关键词

    chiral octahydro-binaphthol compound; circularly polarized organic light-emitting diodes; high efficiency; low efficiency roll-off; thermally activated delayed fluorescence;

    机译：手性八氢联萘酚化合物;圆偏振有机发光二极管;高效率;低效率滚降;热活化延迟荧光;

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