Color stable and low driving voltage white organic light-emitting diodes with low efficiency roll-off achieved by selective hole transport buffer layers

被引：8

作者：

Zhang, Zhensong ^{[1
]}

Xie, Guohua ^{[2
]}

Yue, Shouzhen ^{[1
]}

Wu, Qingyang ^{[1
]}

Chen, Yu ^{[1
]}

Zhang, Shiming ^{[1
]}

Zhao, Li ^{[1
]}

Luo, Yang ^{[1
]}

Zhao, Yi ^{[1
]}

Liu, Shiyong ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Tech Univ Dresden, Inst Angew Photophys, D-01062 Dresden, Germany

来源：

ORGANIC ELECTRONICS | 2012年 / 13卷 / 11期

基金：

美国国家科学基金会;

关键词：

White light; Low operating voltage; High color stability; Low efficiency roll-off; Hole transport buffer layers; EXCITONS; DEVICES;

D O I：

10.1016/j.orgel.2012.07.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

White organic light-emitting diodes (WOLEDs) showing high color stability, low operating voltage, high efficiency and low efficiency roll-off by adopting different hole transport buffer layers which also behaves as electron/exciton blocking layers (EBL) have been developed. The characteristics of WOLEDs based on blue-green and orange phosphors could be easily manipulated by hole transport buffer layer, which tailors charge carrier transportation and energy transfer. Our WOLEDs show low operating voltages, 100 cd/m(2) at 3.2 V. 1000 cd/m(2) at 3.7 V and 10000 cd/m(2) at 4.8 V, respectively, and achieve a current efficiency of 35.0 cd/A, a power efficiency of 29.0 lm/W at a brightness of 1000 cd/m(2), and a low efficiency roll-off 8.7% calculated from the maximum efficiency value to that of 5000 cd/m(2). Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：2296 / 2300

页数：5

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