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首页> 外文期刊>Optical Materials >Bipolar TADF interlayer for high performance hybrid WOLEDs with an ultrathin non-doped emissive layer architecture
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Bipolar TADF interlayer for high performance hybrid WOLEDs with an ultrathin non-doped emissive layer architecture

机译：具有超薄非掺杂发光层架构的高性能杂交层的双极TADF中间层

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摘要

White organic light-emitting diodes (WOLEDs) with non-doped construction have compelling advantages, such as simplifying manufacturing process and reducing costs, thus attracting more attention. To improve the efficiency of non-doped WOLEDs, the selection of suitable interlayer is still a big problem to balance carriers. Here, for the first time, we employed a thermally activated delayed fluorescence (TADF) material with bipolar transport characteristics as the interlayer to modulate the exciton distribution, and fabricated efficient and ultrathin non-doped devices. The optimized monochromatic and white OLED exhibited maximum external quantum efficiencies of 18.1% and 15.6%, current efficiencies of 55.7 cd/A and 46.6 cd/A, as well as power efficiencies of 43.8 lm/W and 41.8 lm/W, respectively. More importantly, the devices adopted an ultrathin non doped emissive layer architecture, and its thickness was only 3.6 nm, which was beneficial to reduce costs and simplify preparation process. Our results illustrated a new strategy that the bipolar TADF interlayer can suppress triplet-triplet annihilation (TTA) effect and improve the exciton utilization, which presents unprecedented opportunities for fabricating highly efficient, low cost and commercial WOLEDs.
机译：具有非掺杂结构的白色有机发光二极管（Woled）具有引人注目的优点，例如简化制造过程和降低成本，从而吸引更多的关注。为了提高非掺杂泡沫的效率，合适的中间层的选择仍然是平衡载体的一个大问题。在此，我们首次使用具有双极传输特性的热活化的延迟荧光（TADF）材料作为中间层来调节激子分布，并制造有效和超薄的非掺杂装置。优化的单色和白色OLED显示出最大的外部量子效率为18.1％和15.6％，目前效率为55.7℃/ a和46.6cd / a，以及43.8升/倍和41.8升/倍的电力效率。更重要的是，该装置采用超薄非掺杂发光层架构，其厚度仅为3.6nm，有利于降低成本并简化制备过程。我们的结果说明了一项新的战略，即双极TADF中间层可以抑制三重态 - 三联抗剥离（TTA）效应并提高激子利用，这提出了缺乏制造高效，低成本和商业磨损的前所未有的机会。

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  • 来源
    《Optical Materials》 |2021年第1期|110592.1-110592.8|共8页
  • 作者

    Xue Chuang; Jiang Xin; Zhang Gang; Jiang Wenlong; Lang Jihui; Zhang Yuyin;

  • 作者单位

    Jilin Normal Univ Coll Informat & Technol Siping 136000 Peoples R China|Jilin Normal Univ Key Lab Funct Mat Phys & Chem Minist Educ Siping 136000 Peoples R China;

    Jilin Normal Univ Coll Informat & Technol Siping 136000 Peoples R China|Jilin Normal Univ Key Lab Funct Mat Phys & Chem Minist Educ Siping 136000 Peoples R China;

    Jilin Normal Univ Coll Informat & Technol Siping 136000 Peoples R China|Jilin Normal Univ Key Lab Funct Mat Phys & Chem Minist Educ Siping 136000 Peoples R China;

    Jilin Normal Univ Coll Informat & Technol Siping 136000 Peoples R China|Jilin Normal Univ Key Lab Funct Mat Phys & Chem Minist Educ Siping 136000 Peoples R China;

    Jilin Normal Univ Key Lab Funct Mat Phys & Chem Minist Educ Siping 136000 Peoples R China;

    Jilin Normal Univ Coll Informat & Technol Siping 136000 Peoples R China|Jilin Normal Univ Key Lab Funct Mat Phys & Chem Minist Educ Siping 136000 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Non-doped; Thermally activated delayed fluorescence (TADF); Bipolar interlayer; Hybrid WOLEDs; Ultrathin;

    机译：非掺杂;热活化的延迟荧光（TADF）;双极性交层;杂交泡沫;超薄;

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