Achieving high-efficiency polymer white-light-emitting devices

被引：403
|
作者：
Huang, JS [1 ]
Li, G [1 ]
Wu, E [1 ]
Xu, QF [1 ]
Yang, Y [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
来源：
ADVANCED MATERIALS | 2006年 / 18卷 / 01期
关键词：
D O I：
10.1002/adma.200501105
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A method was developed to enhance the efficiency of white polymer light emitting devices (WPLEDs) by introducing an electron injection and hole-blocking layer, and using a polymer blend system as the active material. WPLEDs can be realized by the incomplete transfer of energy from poly(9,9-dioctylfluorene) (PFO) to poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV), and the color was modulated from yellow to white by changing the concentration of MEH-PPV. The device shows improved performance and highest power efficiency of 16 lm W-1. The method can also be used to achieve ultrahigh efficient polymer LEDs.
引用
收藏
页码：114 / 117
页数：4
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