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首页> 外文期刊>Advanced Functional Materials >Study of Configuration Differentia and Highly Efficient, Deep-Blue, Organic Light-Emitting Diodes Based on Novel Naphtho[1,2-d]imidazole Derivatives
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Study of Configuration Differentia and Highly Efficient, Deep-Blue, Organic Light-Emitting Diodes Based on Novel Naphtho[1,2-d]imidazole Derivatives

机译：基于新型萘并[1,2-d]咪唑衍生物的构型差异和高效深蓝色有机发光二极管的研究

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摘要

Two novel naphtho[1,2-d]imidazole derivatives are developed as deep-blue, light-emitting materials for organic light-emitting diodes (OLEDs). The 1H-naphtho[1,2-d]imidazole based compounds exhibit a significantly superior performance than the 3H-naphtho[1,2-d]imidazole analogues in the single-layer devices. This is because they have a much higher capacity for direct electron-injection from the cathode compared to their isomeric counterparts resulting in a ground-breaking EQE (external quantum efficiency) of 4.37% and a low turn-on voltage of 2.7 V, and this is hitherto the best performance for a non-doped single-layer fluorescent OLED. Multi-layer devices consisting of both hole- and electron-transporting layers, result in identically excellent performances with EQE values of 4.12-6.08% and deep-blue light emission (Commission Internationale de l'Eclairage (CIE) y values of 0.077-0.115) is obtained for both isomers due to the improved carrier injection and confinement within the emissive layer. In addition, they showed a significantly better blue-color purity than analogous molecules based on benzimidazole or phenanthro[9,10-d]imidazole segments.
机译：已开发出两种新型的萘并[1,2-d]咪唑衍生物，作为深蓝色的有机发光二极管（OLED）的发光材料。在单层设备中，基于1H-萘并[1,2-d]咪唑的化合物显示出比3H-萘并[1,2-d]咪唑类似物明显更好的性能。这是因为与同等异构体相比，它们具有更高的直接从阴极注入电子的能力，从而产生了4.37％的突破性EQE（外部量子效率）和2.7 V的低开启电压，并且迄今为止，它是非掺杂单层荧光OLED的最佳性能。既由空穴传输层又由电子传输层组成的多层器件，其EQE值为4.12-6.08％，深蓝光发射的效果同样好（国际照明委员会（CIE）y值为0.077-0.115由于改善了载流子注入和限制了发射层内的载流子，两种异构体均获得了α）。另外，它们显示出比基于苯并咪唑或菲咯并[9,10-d]咪唑片段的类似分子更好的蓝色纯度。

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  • 来源
    《Advanced Functional Materials》 |2015年第32期|5190-5198|共9页
  • 作者

    Liu Ming; Li Xiang-Long; Chen Dong Cheng; Xie Zhongzhi; Cai Xinyi; Xie Gaozhan; Liu Kunkun; Tang Jianxin; Su Shi-jian; Cao Yong;

  • 作者单位

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

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

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

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

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    organic light-emitting diodes; blue emission; light-emitting devices;

    机译：有机发光二极管;蓝色发射;发光器件;

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