Herein, two new triplet-triplet annihilation (TTA) molecules, namely CCsCN and CTpCN, based on chrysene and triphenylene polyaromatic rings to develop deep-blue emissive materials for efficient non-doped TTA-OLEDs are designed, and synthesized. The polyaromatic rings are directly functionalized with benzonitrile and electron-donating 9-(m-tolyl)carbazole moieties. Their structural, physical, and photophysical properties are experimentally and theoretically studied. Both molecules display deep blue color emissions in solution and neat films with decent hole mobility and high thermal and electrochemical stabilities. They are effectively fabricated as non-doped emitters in the OLEDs, and all devices exhibit deep blue electroluminescence (EL) spectra (CIE_y = 0.08) with narrow full width at half maximum of 74 nm, low turn-on voltages of 3.0 V and TTA characteristics. In particular, the CCsCN-based device achieves the best EL performance with a maximum luminance (L_max) of 6338 cd m⁻², a maximum external quantum efficiency (EQE_max) of 3.33%, and a maximum current efficiency (CE_max) of 2.64 cd A⁻¹.

在此，设计和合成了两种新的三重态-三重态湮没 (TTA) 分子，即CCsCN和CTpCN，它们基于苯环和苯并聚芳环开发用于高效非掺杂 TTA-OLED 的深蓝色发光材料。多芳环直接用苯甲腈和给电子的 9-(间甲苯基)咔唑部分官能化。对它们的结构、物理和光物理特性进行了实验和理论研究。这两种分子在溶液和纯薄膜中都显示出深蓝色发射，具有良好的空穴迁移率和高热稳定性和电化学稳定性。它们被有效地制造为 OLED 中的非掺杂发射器，并且所有器件都表现出深蓝色电致发光 (EL) 光谱 (CIE_y  = 0.08) 具有 74 nm 的窄半峰全宽、3.0 V 的低开启电压和 TTA 特性。特别是，基于CCsCN的器件实现了最佳的 EL 性能，最大亮度 ( L _max ) 为 6338 cd m ^-2，最大外部量子效率 (EQE _max ) 为 3.33%，最大电流效率 (CE _max ) 2.64 cd A ^-1。