Abstract In this work, high performance white organic light-emitting diodes (WOLEDs) were designed and manufactured through co-doping two iridium complexes iridium(III)[bis(4,6-difuorophenyl)pyridinato-N,C2’]picolinate (FIrpic) and bis(2-(9,9-diethyl-9Hfluoren-2-yl)−1-phenyl-1H-benzoimidazol-N,C3)iridium(acetylacetonate) ((fbi)2Ir(acac)) into 9-(4-tert-butylphenyl)−3,6-bis(triphenylsilyl)−9H-carzole (CzSi) film as blue and yellow emitters. By inserting TcTa film as ladder layer, reduced exciton energy losses and direct exciton generation on emitters were realized, which caused adjusted carriers’ balance and enhanced emission efficiency. Consequently, the optimal WOLED with structure of ITO/HAT-CN (6 nm)/HAT-CN (0.2 wt%): TAPC (50 nm)/TcTa (7 nm)/(fbi)2Ir(acac) (1.4 wt%): FIrpic (14 wt%): CzSi (6 nm)/Tm3PyP26PyB (66 nm)/LiF (1 nm)/Al (100 nm) obtained the maximal current efficiency of 61.31 cd/A, corresponding to a maximal power efficiency of 66.38 lm/W. As current density increases from 10 to 100 mA/cm2, Commission Internationale de l'Eclairage (CIE) coordinates of this device shifted slightly from (0.306, 0.391) to (0.285, 0.372). At 1000 (3.8 V) and 2000 cd/m2 (4.3 V), the same device retained the high current efficiencies up to 38.74 and 32.67 cd/A, respectively.

中文翻译：

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具有共掺杂铱配合物作为蓝色和黄色发射器的高效白色有机发光二极管

摘要 在这项工作中，通过共掺杂两种铱配合物铱(III)[双(4,6-二氟苯基)吡啶-N,C2']吡啶甲酸酯(FIrpic ) 和双(2-(9,9-二乙基-9H芴-2-基)-1-苯基-1H-苯并咪唑-N,C3)铱(乙酰丙酮) ((fbi)2Ir(acac)) 转化为 9-(4 -叔丁基苯基)-3,6-双(三苯基甲硅烷基)-9H-carzole (CzSi) 薄膜作为蓝色和黄色发射体。通过插入TcTa薄膜作为阶梯层，实现了减少激子能量损失和在发射器上直接产生激子，从而调节载流子平衡并提高发射效率。因此，具有 ITO/HAT-CN (6 nm)/HAT-CN (0.2 wt%) 结构的最佳 WOLED：TAPC (50 nm)/TcTa (7 nm)/(fbi)2Ir(acac) (1.4 wt%) ): FIrpic (14 wt%): CzSi (6 nm)/Tm3PyP26PyB (66 nm)/LiF (1 nm)/Al (100 nm) 获得的最大电流效率为 61.31 cd/A，对应的最大功率效率为 66.38 lm/W。随着电流密度从 10 mA/cm2 增加到 100 mA/cm2，该设备的国际照明委员会 (CIE) 坐标从 (0.306, 0.391) 略微移动到 (0.285, 0.372)。在 1000 (3.8 V) 和 2000 cd/m2 (4.3 V) 下，同一器件分别保持了高达 38.74 和 32.67 cd/A 的高电流效率。