Spectral studies of white organic light-emitting devices based on multi-emitting layers

被引：14

作者：

Khan, M. A. ^{[1
]}

Xu, Wei

Cao, Jin

Bai, Yu

Zhu, W. Q.

Jiang, X. Y.

Zhang, Z. L.

机构：

[1] Shanghai Univ, Dept Mat Sci, Shanghai 201800, Peoples R China

[2] Shanghai Univ, Minist Educ, Key Lab Adv Display & Syst Applicat, Shanghai 200072, Peoples R China

来源：

DISPLAYS | 2007年 / 28卷 / 01期

基金：

中国国家自然科学基金;

关键词：

organic light-emitting diodes; white OLEDs; multi-emitting layer; RGB structure; exciton diffusion length;

D O I：

10.1016/j.displa.2006.11.003

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

White organic light emitting devices (WOLEDs) with an RBG stacked multilayer structure were demonstrated. In RGB stacked OLEDs, blue emitting, 2-t-butyl-9,10-di-(2-naphthyl)anthracene (TBADN) doped with p-bis(p-N,N-diphenyl-amono-styryl)benzene (DSA-Ph), green emitting, tris-(8-hydroxyquinoline)aluminum (Alq) doped with C545, and red emitting, tris-[8-hydroxyquinoline]aluminum (Alq) doped with 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)- 4H-pyran (DCJTB), were used. By adjusting the order and thickness of emitting layer in RBG structure, we got a white OLED with current efficiency of 5.60 cd/A and Commission Internationale De L'Eclairage (CIE) coordinates of (0.34, 0.34) at 200 mA/cm(2). Its maximum luminance was 20,700 cd/ m(2) at current density of 400 mA/cm(2). The results have been explained on the basis of the theory of excitons generation and diffusion. According to the theory of excitons generation and diffusion, an equation has been set up which relates EL spectra to the thickness of every layer and to the exciton diffusion length. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：26 / 30

页数：5

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