• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Naphthothiadiazole-Based Near-Infrared Emitter with a Photoluminescence Quantum Yield of 60% in Neat Film and External Quantum Efficiencies of up to 3.9% in Nondoped OLEDs
【24h】

Naphthothiadiazole-Based Near-Infrared Emitter with a Photoluminescence Quantum Yield of 60% in Neat Film and External Quantum Efficiencies of up to 3.9% in Nondoped OLEDs

机译：基于萘噻二唑的近红外发射极，在纯膜中的光致发光量子产率为60％，在非掺杂OLED中的外部量子效率高达3.9％

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fluorescent emitters have regained intensive attention in organic light emitting diode (OLED) community owing to the breakthrough of the device efficiency and/or new emitting mechanism. This provides a good chance to develop new near-infrared (NIR) fluorescent emitter and high-efficiency device. In this work, a D-p-A-p-D type compound with naphthothiadiazole as acceptor, namely, 4,4'-(naphtho[2,3-c][1,2,5] thiadiazole-4,9-diyl) bis(N,N-diphenylaniline) (NZ2TPA), is designed and synthesized. The photophysical study and density functional theory analysis reveal that the emission of the compound has obvious hybridized local and charge-transfer (HLCT) state feature. In addition, the compound shows aggregation-induced emission (AIE) characteristic. Attributed to its HLCT mechanism and AIE characteristic, NZ2TPA acquires an unprecedentedly high photoluminescent quantum yield of 60% in the neat film, which is the highest among the reported organic small-molecule NIR emitters and even exceeds most phosphorescent NIR materials. The nondoped devices based on NZ2TPA exhibit excellent performance, achieving a maximum external quantum efficiency (EQE) of 3.9% with the emission peak at 696 nm and a high luminance of 6330 cd m(-2), which are among the highest in the reported nondoped NIR fluorescent OLEDs. Moreover, the device remains a high EQE of 2.8% at high brightness of 1000 cd m(-2), with very low efficiency roll-off.
机译：由于器件效率和/或新的发射机制的突破，荧光发射器在有机发光二极管（OLED）界引起了广泛关注。这为开发新的近红外（NIR）荧光发射器和高效设备提供了很好的机会。在这项工作中，以萘噻二唑为受体的DpApD型化合物，即4,4'-（萘并[2,3-c] [1,2,5]噻二唑-4,9-二基）双（N，N-设计并合成了二苯基苯胺（NZ2TPA）。光物理研究和密度泛函理论分析表明，该化合物的发射具有明显的杂化局部电荷转移（HLCT）状态特征。另外，该化合物显示出聚集诱导发射（AIE）特性。归功于其HLCT机理和AIE特性，NZ2TPA在纯净膜中获得了空前的60％的高光致发光量子产率，在报道的有机小分子NIR发射器中是最高的，甚至超过了大多数磷光NIR材料。基于NZ2TPA的非掺杂器件表现出出色的性能，在696 nm处的发射峰和6330 cd m（-2）的高亮度下实现了3.9％的最大外部量子效率（EQE），在报告中是最高的非掺杂NIR荧光OLED。此外，该器件在1000 cd m（-2）的高亮度下仍保持2.8％的高EQE，效率下降非常低。

著录项

  • 来源
    《Advanced Functional Materials》 |2017年第12期|1606384.1-1606384.7|共7页
  • 作者

    Liu Tengxiao; Zhu Liping; Zhong Cheng; Xie Guohua; Gong Shaolong; Fang Junfeng; Ma Dongge; Yang Chuluo;

  • 作者单位

    Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430072, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China;

    Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430072, Peoples R China;

    Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430072, Peoples R China;

    Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430072, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China;

    South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

    Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430072, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号