A series of novel hyper-structured molecular (HSM) thermally activated delayed fluorescent (TADF) emitters, in which the TADF units and host units are bound together into one inactive core through flexible linkages, were designed. Phenoxazine-triphenyltriazine (PXZ-Trz), 1,3-bis(9H-carbazol-9-yl)benzene (mCP) and calix[4]resorcinarene (CRA) were chosen as the TADF unit, the host unit and the core, respectively. A series of CRA-based HSM emitters, CRA-PXZ-Trz_(X)-mCP_(100−X) (X = 0, 12.5, 25, 50, 75, 87.5 or 100) were successfully synthesized by a two-step click reaction. Upon using non-doped CRA-PXZ-Trz_(87.5)-mCP_(12.5) as the light-emitting layer, the solution-processable OLEDs emitted yellow-green light, and displayed an external quantum efficiency of 16.7% at 100 cd m⁻².

中文翻译：

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用于非掺杂OLED的基于杯[4]间二甲苯芳烃的超结构分子热活化延迟荧光黄绿色发射体

设计了一系列新型的超结构分子（HSM）热激活延迟荧光（TADF）发射器，其中TADF单元和主体单元通过柔性连接键合在一起成为一个非活性核心。选择苯并恶嗪-三苯基三嗪（PXZ-Trz），1,3-双（9 H-咔唑-9-基）苯（mCP）和杯[4]间苯二芳烃（CRA）作为TADF单元，主体单元和核心， 分别。通过两步单击成功合成了一系列基于CRA的HSM发射器CRA-PXZ-Trz _（X） -mCP _{（100- X）}（X = 0、12.5、25、50、75、87.5或100）反应。使用非掺杂的CRA-PXZ-Trz _（87.5） -mCP _{（12.5）时}作为发光层，可溶液处理的OLED发出黄绿色的光，并且在100 cd m ^-2下显示出16.7％的外部量子效率。