Improved performances of the organic light-emitting devices by doping in the mixed layer

被引：10

作者：

Gao, WB ^{[1
]}

Sun, JX ^{[1
]}

Yang, KX ^{[1
]}

Liu, HY ^{[1
]}

Zhao, JH ^{[1
]}

Liu, SY ^{[1
]}

机构：

[1] Jilin Univ, Natl Lab Integrated Optoelect, Changchun 130023, Peoples R China

来源：

OPTICAL AND QUANTUM ELECTRONICS | 2003年 / 35卷 / 13期

基金：

中国国家自然科学基金;

关键词：

concentration; doping; efficiency; lifetime;

D O I：

10.1023/A:1027329302465

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The brightness, efficiency and lifetime of organic light-emitting diodes (OLEDs) were remarkably improved by doping in a mixed layer. In this device, the emitting layer consists of a mixture of alpha-naphthylphenybiphenyl amine (NPB), tris (8-hydroxyquinolinolate) aluminum (Alq(3)) (referred to as the mixed layer) and an emissive dopant 5,6,11,12-petraphenylnaphthacene (rubrene), where the concentration of NPB declined while the concentration of Alq3 was increased gradually in the deposition process. The device exhibited a maximum emission of 49,300 cd/m(2) at a destroy voltage of 35 V and a maximum efficiency of 7.96 cd/A at 10 V, respectively. The efficiency improves twofold in comparison with the conventional doped devices. Meanwhile, the device exhibited superior operational stability with a half-life time of 1000 h at a starting luminance of 1000 cd/m(2) by a constant current driver.

引用

页码：1149 / 1155

页数：7

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