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首页> 外文期刊>Advanced Functional Materials >Thermally Activated Delayed Fluorescence Warm White Organic Light Emitting Devices with External Quantum Efficiencies Over 30%
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Thermally Activated Delayed Fluorescence Warm White Organic Light Emitting Devices with External Quantum Efficiencies Over 30%

机译：热激活的延迟荧光暖白色有机发光器件，外部量子效率超过30％

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摘要

While monochrome organic light-emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) emitters have achieved over 30% external quantum efficiencies (EQEs), all-TADF white OLEDs (WOLEDs) are still lagging behind. Herein, a simple system based on two color-complementary TADF emitters is exploited to realize high-performance WOLEDs. By doping a high-performance orange-red TADF fluorophor (BPPZ-DPXZ) into a blue TADF host (DBFCz-Trz), energy transfer, and triplet-to-singlet conversion in the host-dopant system can be optimized to simultaneously achieve full exciton utilization and color balance. With this design, all-TADF single-emitting-layer WOLEDs with a maximum EQE up to 32.8% are demonstrated. This high efficiency surpasses EQEs of reported WOLEDs based on both TADF as well as phosphorescence. It is expected that this finding can provide new insight for designing highly efficient all-TADF WOLEDs.
机译：虽然基于热活化的延迟荧光（TADF）发射器的单色有机发光二极管（OLED）已经实现了超过30％的外部量子效率（EQES），但所有TADF白OLED（Woled）仍然滞后。 这里，利用基于两个颜色互补的TADF发射器的简单系统来实现高性能磨损。 通过将高性能橙色红色TADF荧光鼠（BPPZ-DPXZ）掺杂到蓝色TADF主机（DBFCZ-TRZ）中，可以优化主机掺杂系统中的能量转移和三重态到单线翻译，以同时实现完整 激子利用和色彩平衡。 通过这种设计，可以对最大EQE的All-Tadf单发射层磨损，最高可达32.8％。 这种高效率超越了报告的Woled的EQES，基于TADF以及磷光。 预计这一发现可以为设计高效的All-Tadf Woled提供新的洞察力。

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  • 来源
    《Advanced Functional Materials》 |2021年第31期|2101647.1-2101647.8|共8页
  • 作者

    Chen Jia-Xiong; Wang Kai; Xiao Ya-Fang; Cao Chen; Tan Ji-Hua; Wang Hui; Fan Xiao-Chun; Yu Jia; Geng Feng-Xia; Zhang Xiao-Hong; Lee Chun-Sing;

  • 作者单位

    Soochow Univ Inst Funct Nano & Soft Mat FUNSOM Suzhou 215123 Jiangsu Peoples R China|Soochow Univ Jiangsu Key Lab Carbon Based Funct Mat & Devices Suzhou 215123 Jiangsu Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films COSDAF Hong Kong 999077 Peoples R China|City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|Soochow Univ Coll Energy Soochow Inst Energy & Mat Innovat SIEMIS Suzhou 215123 Peoples R China;

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

    City Univ Hong Kong Ctr Super Diamond & Adv Films COSDAF Hong Kong 999077 Peoples R China|City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China;

    City Univ Hong Kong Ctr Super Diamond & Adv Films COSDAF Hong Kong 999077 Peoples R China|City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China;

    City Univ Hong Kong Ctr Super Diamond & Adv Films COSDAF Hong Kong 999077 Peoples R China|City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China;

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

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

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

    Soochow Univ Coll Energy Soochow Inst Energy & Mat Innovat SIEMIS Suzhou 215123 Peoples R China;

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

    City Univ Hong Kong Ctr Super Diamond & Adv Films COSDAF Hong Kong 999077 Peoples R China|City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    energy transfer; single emitting-layer; thermally activated delayed fluorescence; white organic light-emitting diodes;

    机译：能量转移;单一发光层;热激活的延迟荧光;白色有机发光二极管;

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