High efficiency green phosphorescent top-emitting organic light-emitting diode with ultrathin non-doped emissive layer

被引：11

作者：

Shi, Xindong ^{[1
]}

Liu, Jun ^{[1
]}

Wang, Jing ^{[1
]}

Wu, Xinkai ^{[1
]}

Zheng, Youxuan ^{[2
]}

He, Gufeng ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Natl Engn Lab TFT LCD Mat & Technol, Shanghai 200240, Peoples R China

[2] Nanjing Univ, Sch Chem & Chem Engn, Nanjing Natl Lab Microstruct, State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China

来源：

ORGANIC ELECTRONICS | 2014年 / 15卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Organic light-emitting diode; Non-doped emissive layer; Ultrathin emissive layer; Cavity standing wave effect; DEVICES;

D O I：

10.1016/j.orgel.2014.07.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrathin non-doped emissive layer (EML) has been employed in green phosphorescent top-emitting organic light-emitting diodes (TOLEDs) to take full advantages of the cavity standing wave condition in a microcavity structure. Much higher out-coupling efficiency has been observed compared to conventional doped EML with relatively wide emission zone. A further investigation on dual ultrathin non-doped EMLs separated by a special bi-layer structure demonstrates better charge carrier balance and improved efficiency. The resulting device exhibits a high efficiency of 125.0 cd/A at a luminance of 1000 cd/m(2) and maintains to 110.9 cd/A at 10,000 cd/m(2). (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：2408 / 2413

页数：6

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