A new family of bipolar fluorinated 3,3′-dimethyl-9,9′-bianthracene derivatives (MBAnFs) have been synthesized, characterized and applied as deep-blue emitters and host materials in fluorescent organic light-emitting devices (OLEDs). Fine tuning the emission characteristics could be achieved by varying the position and the number of the F substituents on the two phenyl rings attached to MBAn core. Remarkably, 10,10′-bis(4-fluorophenyl)-3,3′-dimethyl-9,9′-bianthracene (MBAn-(4)-F)-based OLEDs showed an excellent performance. Both non-doped and doped multilayer OLEDs based on MBAn-(4)-F achieved the maximum external quantum efficiency (EQE_max) of 6.11% and 6.65% with Commission Internationale de L'Eclairage (CIE) coordinates of (0.155, 0.058) and (0.153, 0.055), respectively, matching the requirement of European Broadcasting Union standard of CIE (0.15, 0.06) very well. Furthermore, when doping blue-emitting p-bis(p-N,N-diphenyl-aminostyryl)-benzene (DSA-ph) into MBAn-(4)-F as a light-emitting layer (EML), the device achieved an astonishing current efficiency of 23.01 cd A⁻¹ and a record-setting EQE of 11.52% with negligible efficiency roll-off, compared with other DSA-ph-based OLEDs. These results are attributed to the well-controlled bipolar characteristic of the MABn-(4)-F, leading to a better charge balance in the EML. In addition, the combination of the locally emissive component and twisted intramolecular charge-transfer component in one excited state can significantly enhance the singlet generation fraction in OLEDs.

合成了一个新的双极性氟化3,3'-二甲基-9,9'-联蒽衍生物（MBAnFs）系列，表征并用作深蓝色发射体和荧光有机发光器件（OLED）中的主体材料。可以通过改变连接在MBAn核上的两个苯环上F取代基的位置和数量来实现发射特性的微调。值得注意的是，基于10,10'-双（4-氟苯基）-3,3'-二甲基-9,9'-联蒽（MBAn-（4）-F）的OLED显示出优异的性能。基于MBAn-（4）-F的非掺杂和掺杂多层OLED均实现了最大的外部量子效率（EQE _max）分别为6.11％和6.65％，国际坐标委员会（CIE）坐标分别为（0.155，0.058）和（0.153，0.055），非常符合CIE的欧洲广播联盟标准（0.15，0.06）的要求。此外，当将发蓝光的p-双（p -N，N-N-二苯基-氨基苯乙烯基）苯（DSA-ph）掺杂到MBAn-（4）-F中作为发光层（EML）时，该器件实现了23.01 cd A ^-1的惊人电流效率与其他基于DSA-ph的OLED相比，EQE达到创纪录的11.52％，效率下降可忽略不计。这些结果归因于MABn-（4）-F的良好控制的双极性特性，从而导致了EML中更好的电荷平衡。另外，在一种激发态下，局部发射组分和扭曲的分子内电荷转移组分的组合可以显着提高OLED中的单线态产生分数。