High efficiency rubrene based inverted top-emission organic light emitting devices with a mixed single layer

被引：25

作者：

Wang, Zhaokui ^{[1
]}

Lou, Yanhui ^{[1
]}

Naka, Shigeki ^{[1
]}

Okada, Hiroyuki ^{[1
]}

机构：

[1] Toyama Univ, Grad Sch Sci & Technol, Toyama 9308555, Japan

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 07期

关键词：

Top-emission organic light emitting device (OLED); Mixed single layer; Lifetime; Capping layer; DIODES; TRANSPORT; STABILITY; MECHANISM; COLOR;

D O I：

10.1016/j.jlumin.2010.02.021

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Inverted top-emission organic light emitting devices (TEOLEDs) with a mixed single layer by mixing of electron transport materials (PyPySPyPy and Alq(3)), hole transport material (alpha-NPD) and dope material (rubrene) were investigated. Maximum power efficiency of 3.5 lm/W and maximum luminance of 7000 cd/m(2) were obtained by optimizing the mixing ratio of PyPySPyPy:Alq(3):alpha-NPD:rubrene=25:50:25:1. Luminance and power efficiency of mixed single layer device were two times improved compared to bi-layer heterojunction device and tri-layer heterojunction device. Lifetime test also shows that the mixed single layer device exhibits longer operational lifetimes of 343 h, which is three times longer than the 109 h for tri-layer device, and two times longer than the 158 h for bi-layer device. In addition, the maximum luminance and power efficiency were obtained at 20,000 cd/m(2) and 7.5 lm/W, respectively, when a TPD layer of 45 nm was capped onto the top metal electrode. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1198 / 1202

页数：5

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