The exploration of exciplex for organic light-emitting diodes (OLEDs) has been fleetly developed. However, many of them confront with the problems like phase separation and poor solubility, hampering their utilization in solution process. Hence, a series of soluble exciplex luminophores with the simple architecture of D-spacer-A (mCP-6C-TRZ, phCz-6C-TRZ and 2phCz-6C-TRZ) are synthesized and characterized, in which, the alkyl chain as ample spacer breaks the molecular backbone conjugation, induces intermolecular charge transfer process instead of intramolecular charge transfer in solid state. These materials are endowed with narrowed singlet−triplet splitting energy (ΔE_ST), efficient reverse intersystem crossing (RISC) process, and distinct thermally activated delayed fluorescence (TADF) characteristics. In view of their high triplet energy level (E_T) and bipolar carrier transport ability, where efficient exciplexes are applied as the host, the solution-processed phosphorescence devices realize a low efficiency roll-off of 7.0% at 1000 cd m⁻², high luminance, current efficiency (CE) and external quantum efficiency (EQE) of 25,990 cd m⁻², 20.0 cd A⁻¹ and 6.7%, respectively. These results offer a promising tactic to the establishment of exciplex with TADF feature as host for fabricating efficient solution processed OLEDs.

用于有机发光二极管 (OLED) 的激基复合物的探索已迅速发展。然而，它们中的许多都面临着相分离和溶解度差等问题，阻碍了它们在溶液过程中的应用。因此，合成并表征了一系列具有简单结构的 D-spacer-A（mCP-6C-TRZ、phCz-6C-TRZ 和 2phCz-6C-TRZ）的可溶性激基复合发光体，其中，烷基链为充足的间隔物破坏分子骨架共轭，诱导分子间电荷转移过程，而不是固态分子内电荷转移。这些材料被赋予了狭窄的单线态-三线态分裂能（ΔE _ST)、高效的反向系统间交叉 (RISC) 过程和独特的热激活延迟荧光 (TADF) 特性。鉴于它们的高三重态能级 (E _T ) 和双极载流子传输能力，在应用高效激基复合物作为主体的情况下，溶液处理的磷光器件在 1000 cd m ^{-2 下}实现了 7.0% 的低效率滚降，高亮度、电流效率 (CE) 和外量子效率 (EQE) 分别为 25,990 cd m ^-2、20.0 cd A ^-1和 6.7%。这些结果为建立具有 TADF 特征的激基复合物作为制造高效溶液处理的 OLED 的主体提供了一种有前景的策略。