fluorescence (TADF) emitters is highly desired for the practical application of these materials. We designed and synthesized two isomeric TADF emitters, 2DPyM-mDTC and 3DPyM-pDTC, based on di(pyridinyl)methanone (DPyM) cores as the new electron-accepting units and di(tert-butyl)carbazole (DTC) as the electron-donating units. 3DPyM-pDTC, which is structurally nearly planar with a very small ΔEST, shows higher
这些材料的实际应用非常需要同时提高热激活延迟荧光 (TADF) 发射器的耦合效率、内量子效率和色纯度。我们设计并合成了两种异构 TADF 发射体,2DPyM-mDTC 和 3DPyM-pDTC,基于二(
吡啶基)甲酮(DPyM)核作为新的电子接受单元和二(叔丁基)
咔唑(DTC)作为电子-捐赠单位。3DPyM-pDTC 在结构上几乎是平面的,ΔEST 非常小,与具有更灵活结构的 2DPyM-mDTC 相比,显示出更高的色纯度、
水平比和量子产率。基于 3DPyM-pDTC 作为掺杂剂发射体的电致发光器件可以达到 31.9% 的极高外量子效率,并具有纯蓝色发射。