A novel class of benzo[1,2‐b:4,3‐b′]dithienyl (BDT) silanes 1–3 in which a tetrahedral silicon atom connects two BDT units is developed as high triplet energy 3D‐host. The photophysical and electrochemical properties of these structures are investigated, demonstrating that the peculiar features of the constituting BDT units are preserved in the corresponding silanes. All compounds display deep UV absorption (E_g = 4.10–3.52 eV) and fluorescent emission (300–400 nm for 1 and 2, and 350–450 nm for 3). Phosphorescence is observed at low temperature and the respective T₁ states set at 2.65, 2.59, and 2.25 eV. Emission efficiency in solution is as high as 0.18 in 3. Compound 1 crystallizes in two monoclinic structures without relevant intra‐inter‐molecular contacts; both display similar and intriguing aggregation induced emission‐like deep blue emission (390–397 nm) with quantum yield up to 13%. A blue and a green emissive organic light emitting diode devices are realized using silane 1 as semiconductive host material. The perfect sensitization of the green Ir(ppy)₃ emitter results in a device which nicely compares, in terms of efficiency, with a standard one. The blue FIrpic emitter is instead only partially sensitized on account of the too closed triplets.

中文翻译：

---

用于有机电子的苯并二噻吩基硅烷：AIE固态蓝色发射极和高三重态能量电荷传输材料

一类新的苯并[1,2 b：4,3- b ']二噻吩基（BDT）硅烷1 - 3，其中一个四面体硅原子连接两个BDT单元被显影为高三重态能量3D-主机。研究了这些结构的光物理和电化学性质，表明在相应的硅烷中保留了构成BDT单元的特殊特征。所有化合物均显示出深紫外吸收（E _g  = 4.10-3.52 eV）和荧光发射（1和2为300-400 nm，3为350-450 nm ）。在低温下观察到磷光，相应的T ₁状态设置为2.65、2.59和2.25 eV。溶液中的发射效率高达0.18 in 3。化合物1结晶为两个单斜晶结构，没有相关的分子间内部接触；两者均显示出相似且引人入胜的聚集诱导发射状深蓝色发射（390-397 nm），量子产率高达13％。使用硅烷1作为半导体主体材料实现了蓝色和绿色发光有机发光二极管器件。绿色Ir（ppy）₃发射极的完美感光度使得该设备在效率方面可以与标准设备很好地进行比较。相反，由于三重阀太封闭，蓝色FIrpic发射器仅部分被敏化。