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.
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页数：4
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