Highly efficient electroluminescence from a solution-processable thermally activated delayed fluorescence emitter

被引：71
|
作者：
Wada, Yoshimasa [1 ]
Shizu, Katsuyuki [1 ,2 ]
Kubo, Shosei [1 ]
Suzuki, Katsuaki [1 ]
Tanaka, Hiroyuki [2 ]
Adachi, Chihaya [2 ,3 ]
Kaji, Hironori [1 ]
机构：
[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan
[2] Kyushu Univ, Ctr Organ Photon & Elect Res OPERA, Fukuoka 8190395, Japan
[3] Japan Sci & Technol Agcy, ERATO, Adachi Mol Exciton Engn Project, Fukuoka 8190395, Japan
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 18期
基金：
日本学术振兴会;
关键词：
DIODES;
D O I：
10.1063/1.4935237
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We developed a thermally activated delayed fluorescence (TADF) emitter, 2,4,6-tris(4-(9,9-dimethylacridan-10-yl)phenyl)-1,3,5-triazine (3ACR-TRZ), suitable for use in solution-processed organic light-emitting diodes (OLEDs). When doped into 4,4'-bis(carbazol-9-yl) biphenyl (CBP) host at 16 wt. %, 3ACR-TRZ showed a high photoluminescence quantum yield of 98%. Transient photoluminescence decay measurements of the 16 wt. % 3ACR-TRZ: CBP film confirmed that 3ACR-TRZ exhibits efficient TADF with a triplet-to-light conversion efficiency of 96%. This high conversion efficiency makes 3ACR-TRZ attractive as an emitting dopant in OLEDs. Using 3ACR-TRZ as an emitter, we fabricated a solution-processed OLED exhibiting a maximum external quantum efficiency of 18.6%. (C) 2015 AIP Publishing LLC.
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页数：4
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