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A high thermal stability terpyridine derivative as the electron transporter for long-lived green phosphorescent OLED

机译:一种高热稳定性萜烯衍生物作为用于长寿命的绿色磷光OLED的电子传输车

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摘要

A new terpyridine-based compound of 2,2′,7,7′-tetra([2,2′:6′,2″-terpyridin]-4′-yl)-9,9′-spirobi[fluorene] (4oTPSF) was designed and synthesized as the electron transporter in organic light-emitting diodes (OLEDs). 4oTPSF exhibited excellent thermal stability with high glass transition temperature (T_g) of 250 °C and melting temperature (T_m) of 460 °C during the thermal measurement. The excellent thermal stability is attributed to the molecular structure, that the steric effect of rigid twisted spirobiflourene and the connected terpyridine (TPY) resulted in a decrease of the intermolecular π-stacking interaction. The studies on electrical characteristics of electron-only devices revealed that 4oTPSF showed high electron-transporting capability, as good as the conventional electron-transporting material (ETM) 1,3,5-tris(N-phenylbenzimid-azol-2-yl-benzene (TPBi). A series of green phosphorescent OLEDs (PhOLEDs) based on bis(2-phenylpyridine)iridium(Ⅲ)(2,2,6,6-tetramethylheptane-3,5-diketonate) (Ir(ppy)_2tmd) or tris[2-(p-tolyl)pyridine]iridium(Ⅲ) (Ir(mppy)_3) as emitter and 4oTPSF as ETM displayed a turn-on voltage of 2.23 V and a maximum power efficiency of 97.8 l m/W and a half-life (T_(50)) of 101, 5680 and 319 390 h at an initial luminance of 10 000, 1000 and 100 cd/m~2, respectively. The lifetime of 4oTPSF-based device was twice more than the lifetime of TPBi-based device.
机译:基于新的三吡啶基化合物2,2',7,7'-四([2,2':6',2“ - 吡啶蛋白)-4'-YL)-9,9'-SpiroBi [芴](设计和合成为有机发光二极管(OLED)的电子转运仪。 4 otpsf在热量测量期间具有250℃的高玻璃化转变温度(t_g),熔化温度(t_m),熔化温度(t_m)的熔化温度(t_m)具有优异的热稳定性。优异的热稳定性归因于分子结构,即刚性扭曲的螺氟烯和连接的萜烯(TPY)的空间效应导致分子间π堆叠相互作用的降低。对电子器件的电气特性的研究表明,40点表达显示出高电子传输能力,与传统的电子传输材料(ETM)1,3,5-Tris(N-苯基苯并酰亚胺-Azol-2-Y1-一样好苯(TPBI)。基于双(2-苯基吡啶)铱(Ⅲ)的一系列绿色磷光OLED(PHOLED)(2,2,6,6-四甲基庚烷-3,5-二酮)(IR(PPY)_2TMD)或Tris [2-(p-甲苯基)吡啶]铱(Ⅲ)(IR(MPPY)_3)作为发射器,4 otpsf,ETM显示为2.23 V的导通电压,最大功率效率为97.8 LM / W和a 101,5680和319 390h的半衰期(t_(50))分别为10 000,000和100cd / m〜2的初始亮度。40点基础的设备的寿命超过寿命的两倍基于TPBI的设备。

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  • 来源
    《Organic Electronics》 |2021年第2期|106048.1-106048.7|共7页
  • 作者单位

    Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education Fujian Provincial Key Laboratory for Photonics Technology Fujian Normal University Fuzhou 350007 PR China State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

    State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

    State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

    Valiant Corporation Shandong 264006 PR China;

    Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Beijing 100871 PR China;

    State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

    Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Beijing 100871 PR China;

    State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

    State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

    State Key Laboratory for Artificial Microstructwes and Mesoscopic Physics Department of Physics Peking University 100871 Beijing PR China;

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

    Terpyridine; Spirobiflourene; Electron-transporting material; Phosphorescent OLED; Thermal stability;

    机译:Terpyridine;spirobiflesene;电子传输材料;磷光OLED;热稳定性;

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