Improved efficiency for white organic light-emitting devices based on phosphor sensitized fluorescence

被引：36

作者：

Cheng, G ^{[1
]}

Zhang, YF

Zhao, Y

Liu, SY

Ma, YG

机构：

[1] Jilin Univ, State Key Lab Integrated Optoelect, Sch Sci & Technol, Changchun 130012, Peoples R China

[2] Jilin Univ, Key Lab Supramol Struct & Mat, Minist Educ, Changchun 130012, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 08期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

D O I：

10.1063/1.2178478

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Efficiency of white organic light-emitting devices (WOLEDs) based on phosphor sensitized fluorescence is improved by using an unusual device structure, in which an undoped blue emissive layer is sandwiched between two phosphorescent doped ones. This blue emissive layer blocks a triplet-triplet energy transfer between the two phosphorescent emissive layers, leading to balanced emissions of blue, green, yellow, and red. Thus, an efficient WOLED with a maximum luminous efficiency of 13.8 cd/A, a maximum power efficiency of 8.0 lm/W, a color rendering index of 79, and Commission Internationale de L'Eclairage coordinates of (0.33, 0.35) is achieved. (c) 2006 American Institute of Physics.

引用

页数：3

共 25 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].