It has long been a challenge to achieve iridium(III) complexes with emission colors covering the whole visible and near‐infrared wavelengths, by using similar cyclometalating ligands. Herein, a series of iridium(III) complexes that accomplish broadly tunable phosphorescence from 420 to 729 nm through the use of trifluoromethyl substituents and other conjugated units such as [1,2,5]thiadiazolo[3,4‐c]pyridine in the cyclometalating ligands are reported. The peak external quantum efficiencies of 7.1%, 20.0%, 14.0%, 4.0%, and 16.0% are achieved for deep‐blue, green, red, near‐infrared, and white phosphorescent organic light‐emitting diodes, respectively, by using these iridium(III) complexes.

中文翻译：

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铱（III）配合物的环金属化配体的智能设计，用于从深蓝到近红外的磷光色度的轻松调节

通过使用类似的环金属化配体，实现具有覆盖整个可见光和近红外波长的发射色的铱（III）配合物一直是一个挑战。本文中，通过使用三氟甲基取代基和其他共轭单元，例如[1,2,5]噻二唑并[3,4- c ]吡啶，完成了一系列铱（III）配合物，可实现从420至729 nm的广泛可调磷光。报道了环金属配体。通过使用这些有机发光二极管，深蓝色，绿色，红色，近红外和白色磷光有机发光二极管的峰值外部量子效率分别达到了7.1％，20.0％，14.0％，4.0％和16.0％。铱（III）配合物。