Sub-Microsecond TADF Emission in D-D′-A Emitters

被引：13
作者：
Auffray, Morgan [1 ]
Balijapalli, Umamahesh [1 ]
Ribierre, Jean-Charles [1 ]
Tsuchiya, Youichi [1 ]
Adachi, Chihaya [1 ,2 ]
机构：
[1] Kyushu Univ, Ctr Organ Photon & Elect Res OPERA, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan
[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan
来源：
CHEMISTRY LETTERS | 2020年 / 49卷 / 08期
关键词：
Through-space TADF; Fast reverse intersystem crossing; Dual upconversion; ACTIVATED DELAYED FLUORESCENCE; LIGHT-EMITTING-DIODES; MECHANISM;
D O I：
10.1246/cl.200337
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new series of donor-donor'-acceptor molecules (D-D'-A design) is introduced. Due to different molecular configurations of the emitters, multiple triplet states were detected and happen to drive one thermally activated delayed fluorescence (TADF) with very short lifetime of the order of nanoseconds. A longer TADF component of microsecond order was also observed, thus showing an interesting case of dual upconversion. These results reveal how TADF becomes efficient enough to overwhelm the prompt fluorescence with the assistance of vibrational and rotational motions.
引用
收藏
页码：932 / 935
页数：4
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