Nondoped Electrophosphorescent Organic Light-Emitting Diodes Based on Platinum Complexes

被引：5

作者：

Yang Gang ^{[1
]}

Zhang Di ^{[1
]}

Wang Jun ^{[1
]}

Jiang Quan ^{[1
]}

Zhong Jian ^{[1
]}

Yu Jun-Sheng ^{[1
]}

Zhu Feng-Zhi ^{[1
]}

Luo Kai-Jun ^{[2
]}

Xie Yun ^{[2
]}

Xu Ling-Ling ^{[2
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Sch Optoelect Informat, Chengdu 610054, Peoples R China

[2] Sichuan Normal Univ, Inst Chem & Mat, Chengdu 610081, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2009年 / 26卷 / 07期

基金：

中国国家自然科学基金;

关键词：

ELECTROLUMINESCENT DEVICES; PHOSPHORESCENCE; EFFICIENCY; LAYER;

D O I：

10.1088/0256-307X/26/7/077804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An undoped electrophosphorescent organic light-emitting diode is fabricated using a pure platinum(II) (2-phenylpyridinato-N, C-2) (3-benzoyl-camphor) [(ppy)pt(bcam)] phosphorescent layer acting as the emitting layer. A maximum power efficiency eta(p) of 6.62 lm/W and current efficiency of 14.78 cd/A at 745 cd/m(2) are obtained from the device. The roll-off percentage of eta(p) of the pure phosphorescent phosphor layer device is reduced to 5% at a current density of 20 mA/cm(2), which is about 11% for conventional phosphorescent devices. The low roll-off efficiency is attributed to the phosphorescent material, which has the molecular structure of a strong steric hindrance effect.

引用

页数：4

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