Bright pure blue emission from multilayer organic electroluminescent device with purified unidentate organometallic complex

被引：51

作者：

Im, WB ^{[1
]}

Hwang, HK ^{[1
]}

Lee, JG ^{[1
]}

Han, K ^{[1
]}

Kim, Y ^{[1
]}

机构：

[1] Inst Adv Engn, NESS Ctr, Kyonggi Do 449860, South Korea

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 09期

关键词：

D O I：

10.1063/1.1398604

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multilayer organic electroluminescent devices (OELDs) were fabricated with highly pure 2-(2-hydroxyphenyl)benzoxazolato lithium (LiPBO), which was obtained through stepwise purification process, as a blue emission layer. The ionization potential of the carefully purified LiPBO was similar to5.82 eV. The multilayer OELD with a hole-blocking layer (HBL) emitted almost pure blue light with the CIE color coordinate of x=0.15 and y=0.08. However, the emission color was redshifted when an electron-transporting layer (ETL) was introduced instead of the HBL. The device with both the HBL and the ETL showed stable and bright blue emission above 14 000 cd/m(2) with the color coordinate of x=0.15 and y=0.11, even though the color purity was slightly poorer than that with only the HBL. (C) 2001 American Institute of Physics.

引用

页码：1387 / 1389

页数：3

共 21 条

[1] Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].