Two-coordinate coinage metal (Cu, Ag and Au) complexes with linear carbene–metal–amide (CMA) structure have recently emerged as promising thermally activated delayed fluorescence (TADF) emitters for OLED application. Herein we investigate a series of eight new Au(I) CMA complexes, which incorporate derivatives of 1,3-thiazoline as N-heterocyclic carbene (NHC) ligands. The complexes exhibit blue to green luminescence in thin films. A limitation of the torsional motions around the metal-ligand axis in a combination with the heavy gold atom effect enables highly efficient TADF with photoluminescence quantum yield (PLQY) of up to 0.99 and radiative rates nearing 1·10⁶ s⁻¹. A formation of emissive dimers of complex molecules was observed in vacuum processed OLEDs. Achieved dual electroluminescence from the redshifted (by 120 nm) dimeric species in a combination with co-occurring monomer emission opens potential application prospects in construction of single-emitter white OLEDs.

具有线性碳烯-金属-酰胺（CMA）结构的二配位造币金属（Cu、Ag和Au）配合物最近已成为OLED应用中很有前途的热激活延迟荧光（TADF）发射器。在此，我们研究了一系列八种新型 Au(I) CMA 配合物，其中包含 1,3-噻唑啉衍生物作为 N-杂环卡宾 (NHC) 配体。该配合物在薄膜中表现出蓝色至绿色的发光。围绕金属配体轴的扭转运动的限制与重金原子效应相结合，使得高效的TADF具有高达0.99的光致发光量子产率（PLQY）和接近1·10 6 s -1^的 辐射^率。在真空处理的 OLED 中观察到复杂分子的发射二聚体的形成。红移（120 nm）二聚体与共发生单体发射相结合实现了双电致发光，为单发射器白色 OLED 的构建开辟了潜在的应用前景。