Related Experiment Video
Updated: May 21, 2026
Conducting Multiple Imaging Modes with One Fluorescence Microscope
Published on: October 28, 2018
Dynamic pendulum strategy enables both anti-quenching and fast spin flipping for efficient blue multiple-resonance
Xiangqin Gan1, Bitian Chen1,2, Jia-Qi Li3
1Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, National Center for International Joint Research of Photoelectronic Energy Materials and Application Kunming 650091 P. R. China dingjunqiao@ynu.edu.cn mengguoyun@ynu.edu.cn sihan94720@outlook.com.
Abstract:
Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters have attracted considerable interest due to their superiority in high-resolution organic light-emitting diodes (OLEDs), but suffer from severe aggregation-caused quenching and slow reverse intersystem crossing. Herein, a dynamic pendulum strategy is proposed, in which electron donors are tethered to the classic boron-nitrogen MR core (BCzBN) by employing an oxygen atom as a flexible anchoring point. Benefitting from the distinctive oxygen linkage and dynamic swinging behavior, the resultant MR-TADF emitters can access multiple isomeric conformations, thereby simultaneously achieving blue-shifted emission, preserved narrow full width at half maximum, enhanced quenching resistance, and faster spin flipping compared with BCzBN. As a consequence, the corresponding OLEDs achieve bright blue narrowband electroluminescence in an extremely wide doping window of 1-30 wt%, revealing a record-high external quantum efficiency of 30.4% even at 20 wt%. The results clearly highlight the great potential of the dynamic pendulum strategy for efficient blue MR-TADF emitters.
