题目： | Enhancing multi-resonance thermally activated delayed fluorescence emission via through-space heavy-atom effect |
作者： | Qi Zheng1, Yang-Kun Qu1, Peng Zuo1, Hai-Tian Yuan1, Yue-Jian Yang1, Yu-Chen Qiu1, Liang-Sheng Liao1,2, Dong-Ying Zhou1* and Zuo-Quan Jiang1* |
单位： | 1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China. 2Macao Institute of Materials Science and Engineering Macau University of Science and Technology, Taipa, Macau SAR 999078, P. R. China. |
摘要： | Recent research has focused on the heavy-atom effect in organic luminescent materials, especially in multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters. Traditional strategies involve directly conjugating heavy atoms to the chromophore, which often broadens the emission spectrum. This study explores an unconventional approach using the through-space heavy-atom effect, positioning heavy-atom moieties with nonconjugated short-range interaction with the chromophore. This method successfully demonstrates the "intramolecular external heavy-atom effect" proposed in the 1970s in cutting-edge high-efficiency emissive materials. Comparative analysis of these emitters confirms the spatial heavy-atom effect, maintaining the spectroscopic properties of MR chromophore while significantly improving external quantum efficiency in organic light-emitting diodes (OLEDs). These emitters also mitigate efficiency roll-off, showcasing the potential of spatial interactions to enhance MR-TADF materials for OLED applications. |
影响因子： | 19.1 |
分区情况： | 一区 |
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