Light-emitting diodes based on a carbazole-derivatized dopant: Origin of dopant excitation as a function of the device structure

被引：65

作者：

Ko, CW ^{[1
]}

Tao, YT ^{[1
]}

Lin, JT ^{[1
]}

Thomas, KRJ ^{[1
]}

机构：

[1] Acad Sinica, Inst Chem, Taipei 115, Taiwan

来源：

CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 01期

关键词：

D O I：

10.1021/cm0106365

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：

Efficient green-emitting OLEDs were fabricated by using the carbazole derivative 9-ethyl-N,N'-diphenyl-N,N'-dipyren-1-yl-9H-carbazole-3,6-diamine (C-Et) as a dopant in different layers in a multilayered structure. Depending on the energy levels of the various layers involved, dopant emission can be realized through either energy transfer or the carrier trapping mechanism. By doping into the CBP layer of the device ITO/NPB (40 nm)/CBP:5% C-Et (20 nm)/TPBI (40 nm)/Mg:Ag (50 nm)/Ag(100 nm), a maximum luminance of 48 300 cd/m(2), a maximum quantum efficiency of 3.90%, and a maximum power efficiency of 5.28 lm/W can be achieved.

引用

页码：357 / 361

页数：5

共 17 条

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