Pure green and narrow bandwidth electroluminescence from organic light-emitting diodes

被引:8
|
作者
Yang, SY [1 ]
Xu, Z
Liu, SS
Dong, JF
Zhang, T
Xu, XR
Zhang, L
Yang, ZL
Wu, JG
机构
[1] No Jiaotong Univ, Minist Railway Key Lab, Lab Mat Informat Storage & Display, Inst Optoelect, Beijing 100044, Peoples R China
[2] Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
关键词
organic electroluminescence; Tb3+:(SA)(3); bilayer devices; recombination zone;
D O I
10.7498/aps.50.973
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Pure green and narrow bandwidth emission from organic bilayer electroluminescent devices were presented by using Tb3+ : (SA)(3) as hole-transporting layer and emissive layer, and high fluorescent material Alq(3) acting as electron-transporting layer. It proves that the emission comes from carriers' recombination after their tunneling through the inner interface (Tb3+ :(SA)(3)/Alq(3)) in the bilayer ITO/Tb3+ :(SA)(3)(40nm)/Alq(3) (55 nm)/Al diode. The spectrum of the bilayer devices varies with the thickness of the electron-transporting layer. Keeping the thickness of Tb3+ :(SA)(3) layer constant, there is no emission from Alg layer when Ale layer reduces to 12 nm; meanwhile, pure green and narrow bandwidth emission can be observed. Thus, it provides a simple way to obtain high luminance and long-term stability by reducing electron- or hole-transporting layer, especially, by using a lanthanide complex for emissive layer.
引用
收藏
页码:973 / 976
页数:4
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