Jiang Zhiyong, Wang Jun, Gao Tingting, Ma Jianping, Liu Zhipeng, Chen Runfeng
College of Materials Science and Engineering , Nanjing Forestry University , 159 Longpan Road , Xuanwu District, Nanjing 210037 , China.
Key Laboratory of Flexible Electronics, Institute of Advanced Materials , Nanjing Tech University (NanjingTech) , Nanjing 211816 , China.
ACS Appl Mater Interfaces. 2020 Feb 26;12(8):9520-9527. doi: 10.1021/acsami.9b20568. Epub 2020 Feb 11.
Circularly polarized luminescent (CPL) materials have received a lot of interest due to their potential applications in next-generation displays. However, the development of easily accessible red circularly polarized phosphorescent emitters for practical organic light-emitting diodes fabrication remains a grand challenge. In this paper, we report a new family of CPL-active platinum complexes based on the binaphthalene chiral platform. These axially chiral platinabinaphthalenes were facile synthesized by directly incorporating platinum(II) into the π-conjugated backbone of a commercially available enantiopure binaphthalene derivate. These complexes exhibit aggregation-induced circularly polarized phosphorescence enhancement with high quantum yields of up to 66% and luminescence dissymmetry factors of around 2.6 × 10. Moreover, solution-processable circularly polarized organic light-emitting diodes (CPOLEDs) using these complexes as emitters show good performance with the maximum luminance of up to 3500 cd m and dissymmetry factor values of around 1.0 × 10. These findings by the rational design of axially chiral platinabinaphthalenes are important for the development of high-performance CPL complexes for CPOLEDs.
圆偏振发光（CPL）材料因其在下一代显示器中的潜在应用而备受关注。然而，开发易于获得的用于实际有机发光二极管制造的红色圆偏振磷光发射体仍然是一个巨大的挑战。在本文中，我们报道了基于联萘手性平台的新型CPL活性铂配合物家族。这些轴向手性铂联萘通过将铂（II）直接引入市售对映体纯联萘衍生物的π共轭主链中而易于合成。这些配合物表现出聚集诱导的圆偏振磷光增强，量子产率高达66%，发光不对称因子约为2.6×10。此外，使用这些配合物作为发射体的可溶液加工的圆偏振有机发光二极管（CPOLED）表现出良好的性能，最大亮度高达3500 cd m，不对称因子值约为1.0×10。通过合理设计轴向手性铂联萘获得的这些发现对于开发用于CPOLED的高性能CPL配合物具有重要意义。
