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首页> 外文期刊>Advanced Functional Materials >Efficient Near-Infrared Emission by Adjusting the Guest-Host Interactions in Thermally Activated Delayed Fluorescence Organic Light-Emitting Diodes
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Efficient Near-Infrared Emission by Adjusting the Guest-Host Interactions in Thermally Activated Delayed Fluorescence Organic Light-Emitting Diodes

机译：通过调节热活化延迟荧光有机发光二极管中的客体-主体相互作用，实现有效的近红外发射

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摘要

1802597.1-1802597.7%Thermally activated delayed fluorescence materials can effectively achieve high efficiency by harvesting singlet and triplet excitons in organic light-emitting diodes (OLEDs). However, the choice of host material has a huge impact on the efficiency of the device, especially for the near-infrared (NIR) luminescent material. In this contribution, a series of host materials are used to match the thermally activated delayed fluorescence emitter, 3,4-bis(4-(diphenylamino)phenyl)acenaphtho[1,2-b]pyrazine-8,9-dicarbonitrile (APDC-DTPA), for fabricating NIR OLEDs. All the host materials have the higher triplet energy than that of APDC-DTPA. As the organometallic compound of Zn(BTZ)(2) has relatively stronger dipole moment, the electroluminescence spectral peak of doped device shows strong bathochromic shift exceeding 700 nm and changes with doping concentration. Finally, the extremely high external quantum efficiency of 7.8% (with 10 wt% of doping concentration) and 5.1% (with 20 wt% of doping concentration) are achieved with the emission peaks of 710 and 728 nm, respectively, which are superior to that of the device based on the other host materials. The approach is feasible to achieve bathochromic shift and highly efficient fluorescent OLEDs.
机译：1802597.1-1802597.7％通过在有机发光二极管（OLED）中收集单重态和三重态激子，热活化的延迟荧光材料可以有效地实现高效率。但是，主体材料的选择对设备的效率有很大影响，特别是对于近红外（NIR）发光材料而言。在此贡献中，使用了一系列主体材料来匹配热激活的延迟荧光发射体，3,4-双（4-（二（苯基苯氨基）苯基）ac [1,2-b]吡嗪-8,9-二碳腈（APDC -DTPA），用于制造NIR OLED。所有主体材料的三重态能量均高于APDC-DTPA。由于Zn（BTZ）（2）的有机金属化合物具有相对较强的偶极矩，因此掺杂器件的电致发光光谱峰显示出超过700 nm的强红移并随掺杂浓度而变化。最后，在710和728 nm的发射峰分别达到7.8％（掺杂浓度为10 wt％）和5.1％（掺杂浓度为20 wt％）的极高外部量子效率。设备的其他主机材料为准。该方法对于实现红移和高效荧光OLED是可行的。

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  • 来源
    《Advanced Functional Materials》 |2018年第32期|1802597.1-1802597.7|共7页
  • 作者

    Hu Yun; Yuan Yi; Shi Ying-Li; Li Dan; Jiang Zuo-Quan; Liao Liang-Sheng;

  • 作者单位

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    guest-host interactions; near-infrared OLEDs; thermally activated delayed fluorescence; wavelength tunability;

    机译：客体-宿主相互作用;近红外OLED;热活化延迟荧光;波长可调性;

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