Two novel multiple σ-π conjugated host materials based on both C-Si and N-Si bonding in donor-acceptor molecular architecture were designed and prepared in a highly efficient synthetic method to simultaneously introduce multiple arysilanes to carbazole in one-step and one-pot. These silicon-containing arysilanes/carbazole hybrid hosts show high thermal stability, good film-forming property, high triplet energy, suitable frontier orbital energy level, and acceptable carrier mobility due to enhanced d-orbital participation in the multiple σ-π conjugation through direct N-Si and C-Si coupling. Impressively, the multiple σ-π conjugated host materials also exhibit independently modified the electrical properties without influence the photophysical properties, rendering much improved device performance with maximum external quantum efficiency of 15.8% in blue phosphorescent organic light-emitting diodes (PhOLEDs). These findings highlight the significant importance of the multiple σ-π conjugation strategy in designing cost-effective and high-performance σ-π conjugated semiconductors for advanced optoelectronic applications.

设计并制备了两种基于供体-受体分子结构中基于C-Si和N-Si键的新型多σ-π共轭主体材料，该化合物以一种高效的合成方法同时将多个芳基硅烷一步一步地引入咔唑中。锅。这些含硅的芳基硅烷/咔唑杂化基质表现出高的热稳定性，良好的成膜性，高的三重态能量，合适的前沿轨道能级以及由于提高的d而可接受的载流子迁移通过直接N-Si和C-Si耦合，轨道参与多个σ-π共轭。令人印象深刻的是，多种σ-π共轭主体材料还表现出独立改性的电学性能，而不会影响光物理性能，从而大大提高了器件性能，蓝色磷光有机发光二极管（PhOLED）的最大外部量子效率为15.8％。这些发现凸显了多种σ-π共轭策略在为先进光电应用设计具有成本效益和高性能的σ-π共轭半导体中的重要意义。