Electroluminescence Characteristics of a New Green-Emitting Phenothiazine Derivative with Biphenyl Benzimidazole Substituent

被引：5

作者：

Lee, Sun-Hee ^{[1
,2
]}

Kim, Man Su ^{[1
,2
]}

Cha, Yong-Bum ^{[2
,3
]}

Ahn, Kwang-Hyun ^{[2
,3
]}

Kim, Young Chul ^{[1
,2
]}

机构：

[1] Kyung Hee Univ, Dept Chem Engn, Yongin 446701, Gyeonggi Do, South Korea

[2] Kyung Hee Univ, MRCID, Yongin 446701, Gyeonggi Do, South Korea

[3] Kyung Hee Univ, Dept Appl Chem, Yongin 446701, Gyeonggi Do, South Korea

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2010年 / 520卷

关键词：

Biphenyl benzimidazole; green OLED; phenothiazine; MOLECULAR MATERIALS; KETYL RADICALS; DIODES; FLUOROPHORES; DEVICES; BLUE;

D O I：

10.1080/15421401003608378

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the synthesis and electroluminescence characteristics of a new green-emitting material, 3,7-bis(1-(biphenyl-4-yl)benzimidazol-2-yl) 10-methylphenothiazine (PhBBMP) containing the electron-donating phenothiazine core and the electron-accepting biphenyl benzimidazole substituent. An optimized OLED device with the structure of [ITO/NPB (40 nm)/PhBBMP (30 nm)/BCP (10 nm)/TPBI (30 nm)/LiF (1 nm)/Al (100 nm)] exhibited a luminous efficiency of 4.5 cd/A and an external quantum efficiency of 0.9% at 100mA/cm(2), and the maximum luminance of 12,000 cd/m(2) with the CIE 1931 chromaticity coordinates of (0.21, 0.54). A more balanced charge carrier injection and the charge confinement in the emitting layer cooperatively contributed to improve the performance of the device prepared with the PhBBMP emitting layer.

引用

页码：312 / 319

页数：8

共 17 条

[1] Versatile, Benzimidazole/Amine-Based Ambipolar Compounds for Electroluminescent Applications: Single-Layer, Blue, Fluorescent OLEDs, Hosts for Single-Layer, Phosphorescent OLEDs [J].