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Mixing of Phosphorescent and Exciplex Emission in Efficient Organic Electroluminescent Devices

机译:高效有机电致发光器件中磷光和激基发射的混合

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摘要

We fabricated a yellow organic light-emitting diode (OLED) based on the star-shaped donor compound tri(9-hexylcarbazol-3-yl)amine, which provides formation of the interface exciplexes with the iridium(III) bis[4,6-difluorophenyl]-pyridinato-N,C2']picolinate (FIrpic). The exciplex emission is characterized by a broad band and provides a condition to realize the highly effective white OLED. It consists of a combination of the blue phosphorescent emission from the FIrpic complex and a broad efficient delayed fluorescence induced by thermal activation with additional direct phosphorescence from the triplet exciplex formed at the interface. The fabricated exciplex-type device exhibits a high brightness of 38000 cd/m(2) and a high external quantum efficiency.
机译:我们基于星形供体化合物三(9-己基咔唑-3-基)胺制备了一种黄色有机发光二极管(OLED),该化合物可与铱(III)bis [4,6]形成界面激基复合物。 -二氟苯基]-吡啶基-N,C2']吡啶甲酸酯(FIrpic)。激基复合物发射的特征在于宽带,并且为实现高效的白色OLED提供了条件。它由FIrpic配合物发出的蓝色磷光与热活化引起的广泛有效的延迟荧光与界面处形成的三重态激基复合物产生的额外直接磷光结合而成。所制造的激基复合物型器件具有38000 cd / m(2)的高亮度和高的外部量子效率。

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