题目： |
Linearly Arranged Multi-π-Stacked Structure for Efficient Through-Space Charge-Transfer Emitters |
作者： |
Yang-Kun Qu1#, Dong-Ying Zhou1, Qi Zheng1, Peng Zuo1, Zong-Lu Che1, Liang-Sheng Liao1,2, Zuo-Quan Jiang1* |
单位： |
1Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, P. R. China. 2Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau, P. R. China. |
摘要： |
Noncovalent spatial interaction has become an intriguing and important tool for constructing optoelectronic molecules. In this study, we linearly attached three conjugated units in a multi π-stacked manner by using just one trident bridge based on indeno[2,1-b]fluorene. To achieve this structure, we improved the synthetic approach through double C-H activation, significantly simplifying the preparation process. Due to the proximity of the C10, C11, and C12 sites in indeno[2,1-b]fluorene, we derived two novel donor|acceptor|donor (D|A|D) type molecules, 2DMB and 2DMFB, which exhibited closely packed intramolecular stacking, enabling efficient through-space charge transfer. This molecular construction is particularly suitable for developing high-performance thermally activated delayed fluorescence materials. With donor(s) and acceptor(s) constrained and separated within this spatially rigid structure, elevated radiative transition rates, and high photoluminescence quantum yields were achieved. Organic light-emitting diodes incorporating 2DMB and 2DMFB demonstrated superior efficiency, achieving maximum external quantum efficiencies of 28.6% and 16.2%, respectively. |
影响因子： |
16.1 |
分区情况： |
一区 |
链接： |
责任编辑：郭佳