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Realization of high-efficiency fluorescent organic light-emitting diodes with low driving voltage

机译:低驱动电压的高效荧光有机发光二极管的实现

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摘要

It is commonly accepted that a full bandgap voltage is required to achieving efficient electroluminescence (EL) in organic light-emitting diodes. In this work, we demonstrated organic molecules with a large singlet-triplet splitting can achieve efficient EL at voltages below the bandgap voltage. The EL originates from delayed fluorescence due to triplet fusion. Finally, in spite of a lower quantum efficiency, a blue fluorescent organic light-emitting diode having a power efficiency higher than some of the best thermally activated delayed fluorescent and phosphorescent blue organic light-emitting diodes is demonstrated. The current findings suggest that leveraging triplet fusion from purely organic molecules in organic light-emitting diode materials offers an alternative route to achieve stable and high efficiency blue organic light-emitting diodes.
机译:普遍接受的是,需要全带隙电压来实现有机发光二极管中的有效电致发光(EL)。在这项工作中,我们证明了具有大单重态-三重态分裂的有机分子可以在低于带隙电压的电压下实现有效的EL。 EL源自三重态融合引起的延迟荧光。最后,尽管量子效率较低,但仍展示了功率效率高于某些最佳热激活延迟荧光和磷光蓝色有机发光二极管的蓝色荧光有机发光二极管。当前的发现表明,利用有机发光二极管材料中纯有机分子的三重态融合提供了一种实现稳定高效的蓝色有机发光二极管的替代途径。

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