Novel indolo[3,2,1-jk]carbazole-based bipolar host material for highly efficient thermally activated delayed-fluorescence organic light-emitting diodes

被引：11
作者：
Hiraga, Yasuhide [1 ]
Kuwahara, Rempei [1 ]
Hatta, Taizo [2 ,3 ]
机构：
[1] Hirata Corp, Kita Ku, 111 Hitotsugi, Kumamoto 8610198, Japan
[2] Sojo Univ, Dept Nanosci, Fac Engn, Nishi Ku, 4-22-1 Ikeda, Kumamoto 8600082, Japan
[3] Kumamoto Inst Photoelectro Organ PHOEN, Higashi Ku, 3-11-38 Higashi Machi, Kumamoto 8620901, Japan
来源：
TETRAHEDRON | 2021年 / 94卷
关键词：
Indolo[3; 2; 1-jk]carbazole; 1-jk]carbazole-pyrimidine; Bipolar host material; Host for TADF OLED; Long lifetime TADF OLED; EXTERNAL QUANTUM EFFICIENCY; ELECTRON-TRANSFER REACTIONS; PHOSPHORESCENT; 25-PERCENT; ENERGIES; LIFETIME; LINKAGE; PHOLEDS;
D O I：
10.1016/j.tet.2021.132317
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
A novel bipolar material (ICzPyr) composed of electron-donating indolo[3,2,1-jk]carbazole and electron-withdrawing pyridmidine was developed and its use as a host material in thermally activated delayed-fluorescence (TADF) organic light-emitting diode (OLED) applications was investigated. This material exhibited practical thermal and morphological stabilities, a high triplet energy, and suitable HOMO and LUMO levels for TADF applications. A 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene-based (4CzIPN-based) TADF OLED using ICzPyr as a host material exhibited a much lower driving voltage, higher lu -minous efficiency, and a significantly longer lifetime than a conventional 3,30-di(9H-carbazol-9-yl)-1,10- biphenyl/4CzIPN-based OLED. (c) 2021 Elsevier Ltd. All rights reserved.
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页数：8
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