The realization of robust luminescence in crystalline and anisotropic nanowires of wide bandgap light-emitting conjugated polymers (LCPs) is challenging. Compared to the periodic arrangements in conventional crystalline nanostructure, hierarchical uniform structures will provide an electronic landscape to obtain excellent optoelectronic behaviors, which are desirable for polymer light-emitting diodes (PLEDs) and polymer lasers. Here, we construct a range of robust hierarchical uniform crystalline nanowires of wide bandgap polydiarylfluorenes for light-emitting optoelectronic applications. Steric hindrance interactions of the bulky groups enable these nanowires to show a robust deep-blue emission, due to the suppression of interchain aggregation. Therefore, efficient deep-blue nanowire-based PLEDs with an intrachain excitonic behavior are fabricated. Moreover, our β-conformational hierarchical uniform nanowires present a low-threshold deep-blue lasing behavior. To the best of our knowledge, this is the first deep-blue organic nanolaser based on LCPs self-assembled nanowires by constructing hierarchical uniform crystalline structure.

在宽带隙发光共轭聚合物（LCP）的晶体和各向异性纳米线上实现稳健的发光具有挑战性。与常规晶体纳米结构中的周期性排列相比，分层的均匀结构将提供电子景观以获得出色的光电行为，这对于聚合物发光二极管（PLED）和聚合物激光器是理想的。在这里，我们为发光光电应用构建了一系列宽带隙聚二芳基芴的稳健的分级均匀晶体纳米线。由于抑制链间聚集，庞大基团的立体阻碍相互作用使得这些纳米线能够显示出强大的深蓝色发射。因此，制备具有链内激子行为的高效深蓝色纳米线基PLED。此外，我们的β构象分层均匀纳米线呈现出低阈值的深蓝激光发射行为。据我们所知，这是第一个基于LCP自组装纳米线的深蓝色有机纳米激光，该纳米线通过构造分层均匀的晶体结构来实现。