White emission from organic light-emitting diodes with a super-thin BCP layer

被引：6

作者：

Hao, Jingang ^{[1
]}

Deng, Zhenbo ^{[1
]}

Yang, Shengyi ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Key Lab Luminscence & Opt Informat, Minist Educ, Inst Optoelect Technol, Beijing 100044, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2007年 / 122卷 / 723-726期

基金：

中国国家自然科学基金;

关键词：

white emission; energy transfer; super-thin layer; organic light-emitting diodes (OLEDs);

D O I：

10.1016/j.jlumin.2006.01.271

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a method to achieve white emission from organic light-emitting diodes (OLEDs) in which a super-thin (3 nm) hole blocking layer, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), was inserted between electron-transport layer 8-hydroxyquinoline aluminum (Alq(3)) and 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) doped poly-vinlyearbazole (PVK) layer. The BCP layer can not only confine exciton in the emitting layer but also control energy transfer proportion from PVK to Alq3 and then from Alq3 to DCJTB through BCP layer. In this way, pure white emission with CIE coordinate of (0.32, 0.32) was obtained and it was voltage independent. The brightness reached 270 cd/m(2) at 18V with an efficiency of 0.166 cd/A. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：723 / 726

页数：4

共 9 条

[1] Relationship between electroluminescence and current transport in organic heterojunction light-emitting devices [J].