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首页> 外文期刊>Advanced Functional Materials >Color-Stable, Efficient, and Bright Blue Light-Emitting Electrochemical Cell Using Ionic Exciplex Host
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Color-Stable, Efficient, and Bright Blue Light-Emitting Electrochemical Cell Using Ionic Exciplex Host

机译：使用离子Exciplex主机的色彩稳定，高效和明亮的蓝色发光电化学电池

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摘要

The lack of high-performance blue light-emitting electrochemical cells (LECs) has remained a formidable challenge for fabricating white LECs for lighting applications. Here, a ionic exciplex host is used for color-stable, efficient, and bright blue LECs by taking advantage of its facilitated carrier injection, bipolar charge-transport, and efficient energy transfer to the guest dopant. A cationic donor molecule, 1-(3-(3,6-di-tert-butyl-9H-carbazol-9-yl)phenyl)-3-methyl-1H-imidazol-3-ium hexafluorophosphate (tbuCAZ-ImMePF(6)), and a cationic acceptor molecule, 1-(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-3-ethyl-1H-imidazol-3-ium hexafluorophosphate (TRZ-ImEtPF(6)), are developed to form the ionic exciplex host. The mixed film of tbuCAZ-ImMePF(6)and TRZ-ImEtPF(6)affords blue exciplex with fast reverse intersystem crossing and thermally activated delayed fluorescence. For the film doped with a blue-emitting iridium complex, energy is efficiently transferred from the exciplex to the complex. Host-guest LECs using the doped film as the active layer show stable blue emission color and high current efficiencies of up to 25.8 cd A(-1). More importantly, they attain simultaneously high efficiency and high brightness (14.1/17.4/16.8 cd A(-1)at 705/872/1680 cd m(-2)), which are the most efficient and bright host-guest blue LECs reported so far. The primary host-guest LEC also exhibits promising operational stability. The work reveals that the use of an ionic exciplex host is a promising avenue toward high-performance blue LECs.
机译：缺乏高性能的蓝色发光电化学电池（LECs）对制造用于照明应用的白色LEC来说是一种强大的挑战。这里，通过利用其便于载体喷射，双极电荷运输和高效的能量转移到客人掺杂剂，将离子Exciplex宿主用于颜色稳定，高效和明亮的蓝色LEC。阳离子供体分子，1-（3--（3,6-二叔 - 丁基-9h-咔唑-9-基）苯基）-3-甲基-1H-咪唑-3-Ium六氟磷酸（TBucaz-Immepff（6 ））和阳离子受体分子，1-（3-（4,6-二苯基-1,3,5-三嗪-2-基）苯基）-3-乙基-1H-咪唑-3-Ium六氟磷酸盐（TRZ -imetpf（6））是开发的，以形成离子Exciplex主体。 TBucaz-IMMEPF（6）和TRZ-IMETPF（6）的混合膜提供了具有快速反向间接系统交叉和热活化的延迟荧光的蓝色切口。对于掺杂有蓝色发射铱络合物的薄膜，能量从基于复合物有效地转移到复合物中。 Host-Guest LECS使用掺杂薄膜作为有源层显示稳定的蓝色发光颜色和高达25.8 CD A（-1）的高电流效率。更重要的是，它们同时高效，高亮度（14.1 / 17.4 / 16.8 CD A（-1），是最有效，最明亮的主机蓝色LECS报告迄今为止。主要的主机客座LEC也展示了有希望的运营稳定性。该工作表明，使用离子Exciplex主机是高性能蓝色LEC的承诺大道。

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  • 来源
    《Advanced Functional Materials》 |2021年第3期|2007167.1-2007167.12|共12页
  • 作者

    Bai Rubing; Meng Xianwen; Wang Xiaoxiang; He Lei;

  • 作者单位

    Cent China Normal Univ Coll Chem Hubei Int Sci & Technol Cooperat Base Pesticide & Key Lab Pesticide & Chem Biol Minist Educ Wuhan 430079 Peoples R China;

    Cent China Normal Univ Coll Chem Hubei Int Sci & Technol Cooperat Base Pesticide & Key Lab Pesticide & Chem Biol Minist Educ Wuhan 430079 Peoples R China;

    Cent China Normal Univ Coll Chem Hubei Int Sci & Technol Cooperat Base Pesticide & Key Lab Pesticide & Chem Biol Minist Educ Wuhan 430079 Peoples R China;

    Cent China Normal Univ Coll Chem Hubei Int Sci & Technol Cooperat Base Pesticide & Key Lab Pesticide & Chem Biol Minist Educ Wuhan 430079 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    blue; exciplex; host-guest; light-emitting electrochemical cell; thermally activated delayed fluorescence;

    机译：蓝色;Exciplex;宿主客人;发光电化学电池;热活化的延迟荧光;

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