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Simplified efficient warm white tandem organic light-emitting devices by ultrathin emitters using energy transfer from exciplexes
Organic Electronics ( IF 3.2 ) Pub Date : 2018-10-04 , DOI: 10.1016/j.orgel.2018.09.026
Ting Xu , Jun-Gui Zhou , Man-Keung Fung , Hong Meng

To realize energy-saving and environmental green illumination by simplified white organic light-emitting devices (WOLEDs) structure and fabricate process, herein, we successfully fabricate a novel simplified efficient WOLED structure using energy transfer from interface exciplexes to complementary color dyes as undoped ultrathin emissive layers (UEMLs) based on tandem OLEDs structure. (Acetylacetonato)bis[2-(thieno[3,2-c]pyridin-4-yl)phenyl]iridium(III) (PO-01) and iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,C2′]-picolinate (FIrpic) are applied as yellow and blue UEMLs, respectively. Particularly, the designed WOLED with Commission Internationale De L'Eclairage chromaticity coordinate (0.36, 0.41) obtaining a peak of 41.5 cd/A (EQE = 18.59%) without light out-coupling technology, achieving high current efficiency among reported WOLEDs all emitters applied UEMLs. Moreover, the designed white OLEDs generally emit warm white spectrum with low correlative color temperature of 3686 K–4700 K, which show are available for healthy illumination. Therefore, we believe our work help to further develop ideal simplified WOLEDs structure and fabricate process for energy-conservation and environment-friendly healthy illumination with high efficiency, simplified fabrication, low reagent consumption and cost, simultaneously.



中文翻译:

超薄发射器利用激基复合物的能量转移简化了高效的暖白色串联有机发光器件

为了通过简化的白色有机发光器件(WOLED)结构和制造工艺实现节能环保的绿色照明,本文中,我们成功地利用了从界面复合物到互补色染料的能量转移作为未掺杂的超薄发光体,成功地制造了一种新型的简化高效WOLED结构。基于串联OLED结构的多层(UEML)。(乙酰丙酮)双[2-(硫代[3,2 - c ]吡啶-4-基)苯基]铱(III)(PO-01)和铱(III)双[(4,6-二氟苯基)-吡啶基- ñ,C2']-吡啶甲酸(FIrpic)分别用作黄色和蓝色UEML。特别是,采用国际照明委员会色度坐标(0.36,0.41)设计的WOLED在没有光输出耦合技术的情况下获得41.5 cd / A的峰值(EQE = 18.59%),在报告的所有WOLED发射器中均实现了高电流效率UEML。此外,设计的白色OLED通常会发出暖色的白色光谱,相关色温较低,为3686 K–4700 K,可用于健康照明。因此,我们相信我们的工作有助于进一步开发理想的简化WOLED结构和制造工艺,以实现节能,环保,健康的照明,同时实现高效,简化的制造,低的试剂消耗和成本。

更新日期:2018-10-04
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