Liao Chen, Zhang Yu, Ye Shang-Hui, Zheng Wen-Hua
State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, Jiangsu China.
Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials, National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
ACS Appl Mater Interfaces. 2021 Jun 2;13(21):25186-25192. doi: 10.1021/acsami.1c04779. Epub 2021 May 20.
This work describes the construction of a novel planar chiral [2.2]paracyclophane-based thermally activated delayed fluorescence (TADF)-active molecule with circularly polarized luminescence (CPL). The combination of the bulky planar chiral phenoxazinephane (PXZp) donor based [2.2]paracyclophane and triazine acceptor enables the highly efficient luminescence performances and excellent CPL properties. The enantiomers exhibit excellent TADF activities, the energy difference (Δ) between singlet and triplet of the molecule is only 0.03 eV. Notably, through solution-process, a yellow CP-OLEDs based on the molecule as the emitting layers displays high maximum brightness () up to 34 293 cd m, maximum external quantum efficiency (EQ) up to 7.8% and remarkable CP-EL signal with factor up to 4.6 × 10.
这项工作描述了一种新型的基于平面手性[2.2]对环芳烷的具有圆偏振发光（CPL）的热激活延迟荧光（TADF）活性分子的构建。基于[2.2]对环芳烷的庞大平面手性吩恶嗪并苯（PXZp）供体与三嗪受体的结合实现了高效的发光性能和优异的CPL特性。对映体表现出优异的TADF活性，分子单重态和三重态之间的能量差（Δ）仅为0.03 eV。值得注意的是，通过溶液处理，基于该分子作为发光层的黄色圆偏振有机发光二极管显示出高达34293 cd m的高最大亮度（）、高达7.8%的最大外量子效率（EQ）以及高达4.6×10的显著圆偏振电致发光（CP-EL）信号。
