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首页> 外文期刊>Advanced Functional Materials >Semitransparent Circularly Polarized Phosphorescent Organic Light-Emitting Diodes with External Quantum Efficiency over 30% and Dissymmetry Factor Close to 10~(-2)
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Semitransparent Circularly Polarized Phosphorescent Organic Light-Emitting Diodes with External Quantum Efficiency over 30% and Dissymmetry Factor Close to 10~(-2)

机译：半透明圆形偏振磷光有机发光二极管，外量子效率超过30％和不对称的因子接近10〜（-2）

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摘要

To concurrently realize large electroluminescence dissymmetry factor and high device efficiency remains a formidable challenge in the development of circularly polarized organic light-emitting diode (CP-OLED). In this work, by introducing a famous chiral resource of R-camphor, two green chiral iridium(III) isomers of ?/Delta-Ir-(R-camphor) containing dual stereogenic centers at iridium and ancillary ligand, are efficiently synthesized. Benefiting from their high phosphorescence quantum yields (approximate to 93%) and obvious circularly polarized photoluminescence property with dissymmetry factors (|g(PL)|) in the 10(-3) order of magnitude, the circularly polarized phosphorescent organic light-emitting diodes using these chiral emitters show excellent performances with the maximum external quantum efficiency (EQE(max)) of 30.6%, low efficiency roll-off, and intense circularly polarized electroluminescence signal with dissymmetry factor (g(EL)) in the 10(-4) order of magnitude. By the novel device engineering with semitransparent cathode, the resulting g(EL) values are significantly boosted by one order of magnitude, up to 7.70 x 10(-3), which is the highest among the CP-OLEDs with chiral iridium complexes. Noteworthy, the semitransparent devices deliver a record-high EQE(max) of 18.8% among the semitransparent OLEDs. The combination of novel chiral Ir(III) complexes and the semitransparent devices sheds light on the development of high performance CP-OLEDs with simultaneously high efficiency and large dissymmetry factor.
机译：为了同时实现大的电致发光不对称因子和高器件效率在圆偏振有机发光二极管（CP-OLED）的发展中仍然是一个强大的挑战。在这项工作中，通过引入R-Cabphor的着名手性资源，有效地合成了在铱和辅助配体上含有双层肌肉中心的两种绿色手性铱（III）异构体，是有效地合成的。从其高磷光量（近似为93％）和明显的圆偏振光致发光性，在10（-3）级的数量级，圆偏振磷光有机发光二极管（| G（PL）|使用这些手性发射器显示出具有30.6％，低效率折扣的最大外部量子效率（EQE（MAX））的优异性能，在10（-4 ）数量级。通过具有半透明阴极的新型器件工程，所得的G（EL）值显着升高一个级，高达7.70×10（3），其在具有手性铱络合物的CP-OLED中最高。值得注意的是，半透明装置在半透明OLED中提供18.8％的记录高EQE（最大值）。新型手性IR（III）复合物的组合和半透明装置揭示了高性能CP-OLED的开发，同时具有高效率和大的不对称因子。

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  • 来源
    《Advanced Functional Materials》 |2021年第36期|2102898.1-2102898.8|共8页
  • 作者

    Lu Guangzhao; Wu Zheng-Guang; Wu Ruixia; Cao Xiaosong; Zhou Liang; Zheng You-Xuan; Yang Chuluo;

  • 作者单位

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen Key Lab Polymer Sci & Technol Shenzhen 518060 Peoples R China|Shenzhen Univ Coll Optoelect Engn Minist Educ & Guangdong Prov Key Lab Optoelect Devices & Syst Shenzhen 518060 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn Jiangsu Key Lab Adv Organ Mat State Key Lab Coordinat Chem Nanjing 210023 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Rare Earth Resource Utilizat Changchun 130022 Peoples R China;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen Key Lab Polymer Sci & Technol Shenzhen 518060 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Rare Earth Resource Utilizat Changchun 130022 Peoples R China;

    Nanjing Univ Sch Chem & Chem Engn Jiangsu Key Lab Adv Organ Mat State Key Lab Coordinat Chem Nanjing 210023 Peoples R China;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen Key Lab Polymer Sci & Technol Shenzhen 518060 Peoples R China;

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  • 关键词

    circularly polarized luminescence; iridium complex; organic light-emitting diode; phosphorescence; semitransparent device;

    机译：圆偏振光;铱络合物;有机发光二极管;磷光;半透明装置;

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