Narrow bandwidth red electroluminescence from solution-processed lanthanide-doped polymer thin films

被引:47
|
作者
O'Riordan, A
O'Connor, E
Moynihan, S
Llinares, X
Van Deun, R
Fias, P
Nockemann, P
Binnemans, K
Redmond, G
机构
[1] Tyndall Natl Inst, Nanotechnol Grp, Cork, Ireland
[2] Katholieke Univ Leuven, Dept Chem, B-3001 Louvain, Belgium
关键词
europium complex; sensitisation; organic electroluminescence; polymer spin coating;
D O I
10.1016/j.tsf.2005.05.039
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Narrow bandwidth red electroluminescence from OLED devices fabricated using a simple solution-based approach is demonstrated. A spin-casting method is employed to fabricate organic light emitting diode (OLED) devices comprising a poly(N-vinylcarbazole) (PVK) host matrix doped with a europium beta-diketonate complex, Eu(dbM)(3)(Phen) (dibenzoylmethanate, dbm; 1,10-phenanthroline, Phen) on glass/ indium tin oxide (ITO)/3,4-polyethylene-dioxythiophene-polystyrene sulfonate (PEDOT) substrates. Saturated red europium ion emission, based on the (5)Do -> F-7(2) transition, is centered at a wavelength of 612 nm with a full width at half maximum of 3.5 rim. A maximum external quantum efficiency of 6.3 x 10(-2) cd/A (3.1 X 10(-2)%) and a maximum luminance of 130 cd/M-2 at 400 mA/cm(2) and 25 V is measured for ITO/PEDOT/PVK:Eu(dbM)3(Phen)/Ca/Al devices. This measured output luminance is comparable to that of devices fabricated using more sophisticated small molecule evaporation techniques. (c) 2005 Elsevier B.V All rights reserved.
引用
收藏
页码:264 / 269
页数:6
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