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Highly luminescent phosphine oxide-containing bipolar alkynylgold(iii) complexes for solution-processable organic light-emitting devices with small efficiency roll-offs

机译:用于溶液加工的有机发光器件的高发光性,含氧化膦的双极性炔基金(iii)配合物,效率降幅很小

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摘要

We report the synthesis of alkynylgold(iii) complexes with an electron-transporting phosphine oxide moiety in the tridentate ligand and hole-transporting triarylamine moieties as auxiliary ligands to generate a new class of phosphine oxide-containing bipolar gold(iii) complexes for the first time. Such gold(iii) complexes feature high photoluminescence quantum yields of over 70% in 1,3-bis(N-carbazolyl)benzene thin films with relatively short excited-state lifetimes of less than 3.9 μs at a 20 wt% dopant concentration. Highly efficient solution-processable organic light-emitting devices have been prepared with superior current efficiencies of up to 51.6 cd A–1 and external quantum efficiencies of up to 15.3%. Notably, triplet–triplet annihilation has been significantly reduced, as exemplified by a very small efficiency roll-off of ∼1% at a practical brightness of 500 cd m–2.
机译:我们报告了炔基金(iii)配合物与三齿配体中的电子传输氧化膦部分和空穴传输的三芳基胺部分作为辅助配体的合成,以产生新的一类新的含氧化膦的双极性金(iii)配合物时间。这样的金(iii)配合物在1,3-双(N-咔唑基)苯薄膜中具有较高的光致发光量子产率,在20wt%的掺杂剂浓度下具有相对短的激发态寿命小于3.9μs的70%以上。制备了可溶液处理的高效有机发光器件,其电流效率高达51.6 cd A –1 ,外部量子效率高达15.3%。值得注意的是,三重态-三重态的has灭已显着减少,例如,在500 cd m -2 的实际亮度下,效率下降很小,约为1%。

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