Highly Efficient Phosphorescent Light-Emitting Diodes by Using New Host Material

被引：0

作者：

Seo, M. H. ^{[1
]}

Lee, Kyeong K. ^{[1
]}

Kim, K. S. ^{[2
]}

Lee, S. ^{[1
]}

机构：

[1] Korea Inst Ind Technol, IT Convergence Mat R & BD Grp, Chungnam Do 331822, South Korea

[2] Byuncksan Paint & Coatings Co, Strateg Business Team, Inchon 404310, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2016年 / 16卷 / 03期

关键词：

PhOLED; Host Material; Triazole; Suzuki Reaction; DEVICES; 1,2,4-TRIAZOLE;

D O I：

10.1166/jnn.2016.11050

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An electron-transporting triazole (Tz) and hole transporting carbazole (Cz) moieties were introduced into the fluorene structure via a Suzuki coupling reaction. The resulting material, 9-(4'-(9-(4'-(4,5-diphenyl-4H-1,2,4-triazol-3-yl)-[1,1'-biphenyl]-4-yl)-9H-fluoren-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole (Tz-FL-Cz), was synthesized and can be used as the host layer in phosphorescent OLEDs. The synthesized material exhibits wide energy gap (3.46 eV). The absorption and emission maximum of the Tz-FL-Cz was observed at 300 nm and 389 nm, respectively. Blue phosphorescent devices using Tz-FL-Cz as host material exhibited maximum current efficiency of 3.2 cd/A and power efficiency of 1.3 lm/W, respectively.

引用

页码：2876 / 2879

页数：4

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