Dipolar emitters exhibited excellent performance in organic light-emitting diode (OLED). However, these molecules had intramolecular charge-transfer (ICT) properties, which posed challenge to obtain deep blue emission. In this study, three fluorophores were designed by introducing carbazole and diphenylamine as electron donors and sulfone as electron acceptor due to their mild charge-accepting properties and twisted angles. These materials appeared almost in vertical angles of the dihedral configuration, and exhibited high thermal and electrochemical stability, suitable for solution-processed OLED. The solution-processed non-doped devices based on these three emitters were realized, where two emissions within the standard deep blue emission range were achieved with the Commission International e de l’Eclairage (CIE) coordinates of (0.16, 0.12) and (0.16, 0.15).

双极型发射极在有机发光二极管（OLED）中表现出出色的性能。但是，这些分子具有分子内电荷转移（ICT）特性，这对获得深蓝色发射提出了挑战。在这项研究中，由于引入了咔唑和二苯胺作为电子供体，砜作为电子受体，因此设计了三种荧光团，这是由于它们具有适度的电荷接受特性和扭曲角度。这些材料几乎以二面体构型的垂直角度出现，并显示出高的热稳定性和电化学稳定性，适用于溶液加工的OLED。实现了基于这三个发射极的固溶处理非掺杂器件，其中在国际深蓝星光（CIE）坐标为（0.16，0。