Effects of Green Emission on the Performance of White Organic Light-Emitting Devices and Their Electroluminescent Characteristics

被引：23
|
作者：
Lin, Hua-Ping [1 ,2 ]
Zhou, Fan [1 ,2 ]
Li, Jun [1 ,2 ]
Zhang, Xiao-Wen [3 ]
Zhang, Liang [1 ,2 ]
Jiang, Xue-Yin [1 ,2 ]
Zhang, Zhi-Lin [1 ,2 ]
Zhang, Jian-Hua [2 ]
机构：
[1] Shanghai Univ, Dept Mat Sci, Shanghai 201800, Peoples R China
[2] Shanghai Univ, Minist Educ, Key Lab Adv Display & Syst Applicat, Shanghai 200072, Peoples R China
[3] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 49期
基金：
中国国家自然科学基金;
关键词：
HIGHLY EFFICIENT; DIODES; BLUE; LAYER; ALUMINUM; DOPANTS; EXCIMER; ALQ(3);
D O I：
10.1021/jp206318h
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A white organic light-emitting device (WOLED) using tris(8-hydroxyquinoline)aluminum (Alq(3)) as the green emission is demonstrated. Our experiments indicate that Alq(3) doping not only improves the color coordinates and color stability, but also reduces current-induced fluorescence quenching. A maximum luminous efficiency of 8.87 cd/A and an applicable value of 7.92 cd/A at 20 mA/cm(2) are obtained. The excellent performance predominantly results from the effective energy transfer in the emitting system and the efficient utilization of Alq(3) green emission. For comparison, WOLEDs with different components as the green emission and without the component of green emission are also fabricated and investigated. Our results show that the introduction of green emission from an appropriate component significantly improves the device efficiency and color properties. This result is further verified on the basis of the theory of exciton generation and diffusion.
引用
收藏
页码：24341 / 24346
页数：6
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